From 86551712e547f71c159d9e191385a726d5dc52e0 Mon Sep 17 00:00:00 2001
From: Lootyhoof <lootyhoofer@gmail.com>
Date: Sun, 5 Apr 2020 15:15:27 +0100
Subject: [PATCH] [Pale-Moon] Replace -moz prefixed logical properties in
 themes

---
 application/palemoon/base/content/browser.css |   2 +-
 .../components/abouthome/aboutHome.css        |   8 +-
 .../palemoon/themes/linux/aboutCertError.css  |  10 +-
 .../themes/linux/aboutPrivateBrowsing.css     |   4 +-
 .../themes/linux/aboutSessionRestore.css      |   4 +-
 .../palemoon/themes/linux/aboutSyncTabs.css   |  14 +-
 .../palemoon/themes/linux/autocomplete.css    |  10 +-
 application/palemoon/themes/linux/browser.css |  86 ++++-----
 .../downloads/allDownloadsViewOverlay.css     |   2 +-
 .../themes/linux/downloads/downloads.css      |   6 +-
 .../palemoon/themes/linux/engineManager.css   |   4 +-
 .../themes/linux/feeds/subscribe-ui.css       |   6 +-
 .../palemoon/themes/linux/feeds/subscribe.css |  24 +--
 .../palemoon/themes/linux/pageInfo.css        |  22 +--
 .../linux/permissions/aboutPermissions.css    |   8 +-
 .../linux/places/editBookmarkOverlay.css      |   2 +-
 .../themes/linux/places/organizer.css         |   4 +-
 .../themes/linux/preferences/applications.css |  18 +-
 .../palemoon/themes/linux/sanitizeDialog.css  |  18 +-
 .../palemoon/themes/linux/searchbar.css       |   4 +-
 .../themes/linux/statusbar/overlay.css        |   4 +-
 .../palemoon/themes/linux/syncCommon.css      |   2 +-
 .../palemoon/themes/linux/syncSetup.css       |   2 +-
 .../palemoon/themes/osx/aboutCertError.css    |  10 +-
 .../themes/osx/aboutPrivateBrowsing.css       |   4 +-
 .../palemoon/themes/osx/aboutSyncTabs.css     |  14 +-
 .../palemoon/themes/osx/autocomplete.css      |   8 +-
 application/palemoon/themes/osx/browser.css   | 138 +++++++-------
 .../osx/downloads/allDownloadsViewOverlay.css |   2 +-
 .../themes/osx/downloads/downloads.css        |   6 +-
 .../palemoon/themes/osx/engineManager.css     |   4 +-
 .../themes/osx/feeds/subscribe-ui.css         |   6 +-
 .../palemoon/themes/osx/feeds/subscribe.css   |  24 +--
 application/palemoon/themes/osx/pageInfo.css  |  20 +-
 .../osx/permissions/aboutPermissions.css      |   8 +-
 .../palemoon/themes/osx/places/organizer.css  |   8 +-
 .../palemoon/themes/osx/places/places.css     |   2 +-
 .../themes/osx/preferences/applications.css   |  18 +-
 .../palemoon/themes/osx/sanitizeDialog.css    |  12 +-
 application/palemoon/themes/osx/searchbar.css |   2 +-
 .../palemoon/themes/osx/statusbar/overlay.css |   2 +-
 .../palemoon/themes/osx/syncCommon.css        |   2 +-
 application/palemoon/themes/osx/syncSetup.css |   2 +-
 .../themes/shared/plugin-doorhanger.inc.css   |   4 +-
 .../themes/windows/aboutCertError.css         |  10 +-
 .../themes/windows/aboutPrivateBrowsing.css   |   4 +-
 .../palemoon/themes/windows/aboutSyncTabs.css |  14 +-
 .../palemoon/themes/windows/autocomplete.css  |   6 +-
 .../palemoon/themes/windows/browser.css       | 174 +++++++++---------
 .../downloads/allDownloadsViewOverlay.css     |   4 +-
 .../themes/windows/downloads/downloads.css    |   6 +-
 .../palemoon/themes/windows/engineManager.css |   4 +-
 .../themes/windows/feeds/subscribe-ui.css     |   6 +-
 .../themes/windows/feeds/subscribe.css        |  24 +--
 .../palemoon/themes/windows/pageInfo.css      |  20 +-
 .../windows/permissions/aboutPermissions.css  |   8 +-
 .../windows/places/editBookmarkOverlay.css    |   2 +-
 .../themes/windows/places/organizer.css       |  28 +--
 .../palemoon/themes/windows/places/places.css |   2 +-
 .../windows/preferences/applications.css      |  18 +-
 .../themes/windows/sanitizeDialog.css         |  12 +-
 .../palemoon/themes/windows/searchbar.css     |   4 +-
 .../themes/windows/statusbar/overlay.css      |   4 +-
 .../palemoon/themes/windows/syncCommon.css    |   2 +-
 .../palemoon/themes/windows/syncSetup.css     |   2 +-
 65 files changed, 457 insertions(+), 457 deletions(-)

diff --git a/application/palemoon/base/content/browser.css b/application/palemoon/base/content/browser.css
index a2970aefc3..37cabf5c26 100644
--- a/application/palemoon/base/content/browser.css
+++ b/application/palemoon/base/content/browser.css
@@ -321,7 +321,7 @@ panel[noactions] > richlistbox > richlistitem[type~="action"] > .ac-url-box > .a
 }
 
 #identity-box.verifiedIdentity > #identity-icon-labels > #identity-icon-label {
-  -moz-margin-end: 0.25em !important;
+  margin-inline-end: 0.25em !important;
 }
 
 #wrapper-search-container > #search-container > #searchbar > .searchbar-textbox > .autocomplete-textbox-container > .textbox-input-box > html|*.textbox-input {
diff --git a/application/palemoon/components/abouthome/aboutHome.css b/application/palemoon/components/abouthome/aboutHome.css
index 2b062e8e7e..b41eab32af 100644
--- a/application/palemoon/components/abouthome/aboutHome.css
+++ b/application/palemoon/components/abouthome/aboutHome.css
@@ -63,7 +63,7 @@ a {
   display: -moz-box;
   -moz-box-align: center;
   padding-top: 2px;
-  -moz-padding-end: 8px;
+  padding-inline-end: 8px;
 }
 
 #searchLogoContainer[hidden] {
@@ -99,12 +99,12 @@ a {
 }
 
 #searchSubmit {
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   background: linear-gradient(hsla(0,0%,100%,.8), hsla(0,0%,100%,.1)) padding-box;
   padding: 0 9px;
   border: 1px solid;
   border-color: hsla(210,54%,20%,.15) hsla(210,54%,20%,.17) hsla(210,54%,20%,.2);
-  -moz-border-start: 1px solid transparent;
+  border-inline-start: 1px solid transparent;
   border-radius: 0 2.5px 2.5px 0;
   box-shadow: 0 0 2px hsla(0,0%,100%,.5) inset,
               0 1px 0 hsla(0,0%,100%,.2);
@@ -279,7 +279,7 @@ body[narrow] #restorePreviousSession {
   display: inline-block; /* display on same line as text label */
   vertical-align: middle;
   margin-bottom: 0;
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
 }
 
 #restorePreviousSession:-moz-dir(rtl)::before {
diff --git a/application/palemoon/themes/linux/aboutCertError.css b/application/palemoon/themes/linux/aboutCertError.css
index dbb3530253..100bb3d3bb 100644
--- a/application/palemoon/themes/linux/aboutCertError.css
+++ b/application/palemoon/themes/linux/aboutCertError.css
@@ -33,7 +33,7 @@ h2 {
   border-radius: 10px;
   box-shadow: 0px 0px 8px red;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: url("chrome://global/skin/icons/sslWarning.png") left 0 no-repeat -moz-Field;
   background-origin: content-box;
 }
@@ -43,16 +43,16 @@ h2 {
 }
 
 #errorTitle {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorLongContent {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 .expander > button {
-  -moz-padding-start: 20px;
-  -moz-margin-start: -20px;
+  padding-inline-start: 20px;
+  margin-inline-start: -20px;
   background: url("chrome://browser/skin/aboutCertError_sectionExpanded.png") left center no-repeat;
   border: none;
   font: inherit;
diff --git a/application/palemoon/themes/linux/aboutPrivateBrowsing.css b/application/palemoon/themes/linux/aboutPrivateBrowsing.css
index 2bb39d2950..a6fd549202 100644
--- a/application/palemoon/themes/linux/aboutPrivateBrowsing.css
+++ b/application/palemoon/themes/linux/aboutPrivateBrowsing.css
@@ -21,7 +21,7 @@ body.normal > #errorPageContainer {
 }
 
 #startPrivateBrowsingDesc > button {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #footerDesc > p {
@@ -30,7 +30,7 @@ body.normal > #errorPageContainer {
 
 #moreInfo {
   font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
-  -moz-padding-start: 25px;
+  padding-inline-start: 25px;
   background: url("moz-icon://stock/gtk-dialog-info?size=menu") no-repeat top left;
 }
 
diff --git a/application/palemoon/themes/linux/aboutSessionRestore.css b/application/palemoon/themes/linux/aboutSessionRestore.css
index a32b9757a0..a58c104ce8 100644
--- a/application/palemoon/themes/linux/aboutSessionRestore.css
+++ b/application/palemoon/themes/linux/aboutSessionRestore.css
@@ -82,9 +82,9 @@ treechildren::-moz-tree-row(alternate, selected) {
 }
 
 #buttons {
-  -moz-margin-start: 80px; /* same as #errorLongContent in netError.css */
+  margin-inline-start: 80px; /* same as #errorLongContent in netError.css */
 }
 #buttons > button {
   margin-top: 2em;
-  -moz-margin-start: 5px;
+  margin-inline-start: 5px;
 }
diff --git a/application/palemoon/themes/linux/aboutSyncTabs.css b/application/palemoon/themes/linux/aboutSyncTabs.css
index 4f21a9d408..1fcd8304f7 100644
--- a/application/palemoon/themes/linux/aboutSyncTabs.css
+++ b/application/palemoon/themes/linux/aboutSyncTabs.css
@@ -22,18 +22,18 @@
   margin-top: 4px;
   width: 45em;
   height: 32px;
-  -moz-margin-start: 2em;
-  -moz-margin-end: 2em;
+  margin-inline-start: 2em;
+  margin-inline-end: 2em;
 }
 
 #tabsListHeading {
   font-size: 140%;
   font-weight: bold;
-  -moz-margin-start: 40px;
+  margin-inline-start: 40px;
 }
 
 richlistitem {
-  -moz-margin-end: 2em;
+  margin-inline-end: 2em;
 }
 
 richlistitem[selected="true"],
@@ -46,7 +46,7 @@ richlistitem[type="tab"] {
   border: #999999 1px solid !important;
   padding: 2px 5px;
   margin-bottom: 4px;
-  -moz-margin-start: 4em;
+  margin-inline-start: 4em;
   border-radius: 6px;
   background-color: menu;
   width: 44em;
@@ -64,7 +64,7 @@ richlistitem[type="tab"][selected="true"] {
 richlistitem[type="client"] {
   min-height: 2em;
   color: #000000;
-  -moz-margin-start: 2em;
+  margin-inline-start: 2em;
   margin-top: 2px;
   margin-bottom: 3px;
   width: 42em;
@@ -96,6 +96,6 @@ richlistitem.desktop[type="client"] {
 }
 
 .tabIcon {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
   padding-top: 2px;
 }
diff --git a/application/palemoon/themes/linux/autocomplete.css b/application/palemoon/themes/linux/autocomplete.css
index ab926851dc..e23e6b001a 100644
--- a/application/palemoon/themes/linux/autocomplete.css
+++ b/application/palemoon/themes/linux/autocomplete.css
@@ -83,7 +83,7 @@ panel[type="private-autocomplete-richlistbox"],
 }
 
 .private-autocomplete-treebody::-moz-tree-cell-text {
-  -moz-padding-start: 8px;
+  padding-inline-start: 8px;
 }
 
 treechildren.private-autocomplete-treebody::-moz-tree-row(selected) {
@@ -143,15 +143,15 @@ treechildren.private-autocomplete-treebody::-moz-tree-cell-text(selected) {
   width: 16px; 
   height: 16px;
   margin-bottom: -2px;
-  -moz-margin-start: 3px;
-  -moz-margin-end: 6px;
+  margin-inline-start: 3px;
+  margin-inline-end: 6px;
 }
 
 .ac-type-icon {
   width: 16px; 
   height: 16px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 4px;
+  margin-inline-start: 6px;
+  margin-inline-end: 4px;
 }
 
 .ac-extra > .ac-result-type-tag {
diff --git a/application/palemoon/themes/linux/browser.css b/application/palemoon/themes/linux/browser.css
index 4933b40690..28956cdb1b 100644
--- a/application/palemoon/themes/linux/browser.css
+++ b/application/palemoon/themes/linux/browser.css
@@ -92,8 +92,8 @@ toolbarbutton.bookmark-item:hover:active,
 toolbarbutton.bookmark-item[open="true"] {
   padding-top: 3px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .bookmark-item > .toolbarbutton-icon {
@@ -137,7 +137,7 @@ menuitem.bookmark-item {
 }
 
 .bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 /* Bookmark drag and drop styles */
@@ -157,7 +157,7 @@ menuitem.bookmark-item {
 .menupopup-drop-indicator {
   list-style-image: none;
   height: 2px;
-  -moz-margin-end: -4em;
+  margin-inline-end: -4em;
   background-color: Highlight;
 }
 
@@ -559,7 +559,7 @@ menuitem:not([type]):not(.menuitem-tooltip):not(.menuitem-iconic-tooltip) {
 }
 
 .toolbarbutton-1 > .toolbarbutton-icon {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 toolbar[mode="full"] .toolbarbutton-1:not([type="menu-button"]),
@@ -897,7 +897,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 /* Fullscreen window controls */
 #window-controls {
   -moz-box-align: start;
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 #minimize-button {
@@ -923,7 +923,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 }
 
 .urlbar-input-box {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   min-width: 4em;
 }
 
@@ -948,25 +948,25 @@ toolbar[iconsize="small"] #webrtc-status-button {
 #urlbar-search-splitter {
   -moz-appearance: none;
   width: 8px;
-  -moz-margin-start: -4px;
+  margin-inline-start: -4px;
 }
 
 #urlbar-search-splitter + #urlbar-container > #urlbar ,
 #urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #urlbar-display-box {
   margin-top: -1px;
   margin-bottom: -1px;
-  -moz-border-end: 1px solid #AAA;
-  -moz-margin-end: 3px;
+  border-inline-end: 1px solid #AAA;
+  margin-inline-end: 3px;
 }
 
 #urlbar-display {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   color: GrayText;
 }
 
@@ -976,8 +976,8 @@ toolbar[iconsize="small"] #webrtc-status-button {
   height: 16px;
   margin-top: 2px;
   margin-bottom: 2px;
-  -moz-margin-start: 4px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 4px;
+  margin-inline-end: 3px;
   list-style-image: url(chrome://browser/skin/identity-icons-generic.png);
   -moz-image-region: rect(0, 16px, 16px, 0);
 }
@@ -1013,7 +1013,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 #identity-box {
   padding: 1px;
   margin: -1px;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
   font-size: .9em;
 }
 
@@ -1033,13 +1033,13 @@ toolbar[iconsize="small"] #webrtc-status-button {
 }
 
 #identity-icon-labels {
-  -moz-padding-start: 2px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 2px;
+  padding-inline-end: 5px;
 }
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity {
   color: rgb(95,127,67);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: linear-gradient(rgba(226,246,208,1),
                                     rgba(203,235,177,1));
   background-position: right;
@@ -1048,7 +1048,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain {
   color: rgb(51,87,137);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: linear-gradient(rgba(220,231,245,1),
                                     rgba(207,221,242,1));
   background-position: right;
@@ -1109,13 +1109,13 @@ toolbar[iconsize="small"] #webrtc-status-button {
 /* Identity popup body text */
 .identity-popup-description {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 2px 0 4px;
 }
 
 .identity-popup-label {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 0;
 }
 
@@ -1141,7 +1141,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption ,
 #identity-popup-content-box.verifiedDomain > #identity-popup-encryption {
   margin-top: 10px;
-  -moz-margin-start: -18px;
+  margin-inline-start: -18px;
 }
 
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption > vbox > #identity-popup-encryption-icon ,
@@ -1162,7 +1162,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
 .popup-notification-icon {
   width: 64px;
   height: 64px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .popup-notification-icon[popupid="geolocation"] {
@@ -1200,8 +1200,8 @@ toolbar[iconsize="small"] #webrtc-status-button {
 
 .popup-progress-label,
 .popup-progress-meter {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 .popup-progress-cancel {
@@ -1210,7 +1210,7 @@ toolbar[iconsize="small"] #webrtc-status-button {
   border: none;
   padding: 0;
   margin: 0;
-  -moz-margin-start: 5px;
+  margin-inline-start: 5px;
   min-height: 0;
   min-width: 0;
   list-style-image: url("moz-icon://stock/gtk-cancel?size=menu");
@@ -1252,13 +1252,13 @@ toolbar[iconsize="small"] #webrtc-status-button {
   border-width: 0 8px 0 0;
   border-style: solid;
   border-image: url("chrome://browser/skin/urlbar-arrow.png") 0 8 0 0 fill;
-  -moz-margin-end: -8px;
+  margin-inline-end: -8px;
   margin-top: -1px;
   margin-bottom: -1px;
 }
 
 #notification-popup-box:not([hidden]) + #identity-box {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   border-radius: 0;
 }
 
@@ -1710,7 +1710,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 .tab-icon-image {
   width: 16px;
   height: 16px;
-  -moz-margin-end: 3px;
+  margin-inline-end: 3px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
 }
 
@@ -1725,8 +1725,8 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 .tab-throbber[pinned],
 .tab-icon-image[pinned],
 .tabs-newtab-button > .toolbarbutton-icon {
-  -moz-margin-start: 2px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 2px;
+  margin-inline-end: 2px;
 }
 
 #context_reloadTab {
@@ -1766,12 +1766,12 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   padding: 0;
   margin-top: -1px;
   margin-bottom: -1px;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
 }
 
 /* Tab sound indicator */
 .tab-icon-sound {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   width: 16px;
   height: 16px;
   padding: 0;
@@ -1876,13 +1876,13 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 }
 
 .tabbrowser-arrowscrollbox > .scrollbutton-up {
-  -moz-border-start: 0;
-  -moz-border-end: 2px solid transparent;
+  border-inline-start: 0;
+  border-inline-end: 2px solid transparent;
 }
 
 .tabbrowser-arrowscrollbox > .scrollbutton-down {
-  -moz-border-start: 2px solid transparent;
-  -moz-border-end: 0;
+  border-inline-start: 2px solid transparent;
+  border-inline-end: 0;
   transition: 1s box-shadow ease-out;
   border-radius: 4px;
 }
@@ -1952,7 +1952,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 
 #sidebar-throbber[loading="true"] {
   list-style-image: url("chrome://global/skin/icons/loading_16.png");
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 toolbarbutton.chevron {
@@ -2040,8 +2040,8 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
 }
 
 #allTabs-filter {
-  -moz-margin-start: 36px;
-  -moz-margin-end: 0;
+  margin-inline-start: 36px;
+  margin-inline-end: 0;
 }
 
 .allTabs-preview-label {
@@ -2051,7 +2051,7 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
 /* Application button menu */
 
 .splitmenu-menuitem {
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
 }
 
 #appmenu-toolbar-button:not(:hover):not([open]):not(:-moz-lwtheme) {
@@ -2064,7 +2064,7 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
   margin-bottom: -2px !important;
 }
 #appmenuSecondaryPane {
-  -moz-border-start: 1px solid ThreeDShadow;
+  border-inline-start: 1px solid ThreeDShadow;
 }
 #appmenuSecondaryPane-spacer {
   min-height: 1em;
@@ -2184,7 +2184,7 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
   text-shadow: none;
   background-image: linear-gradient(#B4211B, #8A1915);
   border-radius: 1px;
-  -moz-margin-end: 2px;
+  margin-inline-end: 2px;
 }
 %endif
 
diff --git a/application/palemoon/themes/linux/downloads/allDownloadsViewOverlay.css b/application/palemoon/themes/linux/downloads/allDownloadsViewOverlay.css
index 3526e01d69..b417884725 100644
--- a/application/palemoon/themes/linux/downloads/allDownloadsViewOverlay.css
+++ b/application/palemoon/themes/linux/downloads/allDownloadsViewOverlay.css
@@ -14,7 +14,7 @@
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* Prevent flickering when changing states. */
   min-height: 32px;
   min-width: 32px;
diff --git a/application/palemoon/themes/linux/downloads/downloads.css b/application/palemoon/themes/linux/downloads/downloads.css
index 79bb5ee579..368abd6770 100644
--- a/application/palemoon/themes/linux/downloads/downloads.css
+++ b/application/palemoon/themes/linux/downloads/downloads.css
@@ -51,7 +51,7 @@
 #downloadsSummary,
 richlistitem[type="download"] {
   height: 6em;
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
   color: inherit;
 }
 
@@ -96,7 +96,7 @@ richlistitem[type="download"]:last-child {
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* Prevent flickering when changing states. */
   min-height: 32px;
   min-width: 32px;
@@ -358,7 +358,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   background-image: linear-gradient(#505050, #575757);
   border: 1px solid;
   border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  -moz-border-start: none;
+  border-inline-start: none;
   border-radius: 0 2px 2px 0;
 }
 
diff --git a/application/palemoon/themes/linux/engineManager.css b/application/palemoon/themes/linux/engineManager.css
index 18817cd4f2..c6d42cce29 100644
--- a/application/palemoon/themes/linux/engineManager.css
+++ b/application/palemoon/themes/linux/engineManager.css
@@ -5,8 +5,8 @@
 %endif
 
 #engineList treechildren::-moz-tree-image(engineName) {
-  -moz-margin-end: 4px;
-  -moz-margin-start: 1px;
+  margin-inline-end: 4px;
+  margin-inline-start: 1px;
   width: 16px;
   height: 16px;
 }
diff --git a/application/palemoon/themes/linux/feeds/subscribe-ui.css b/application/palemoon/themes/linux/feeds/subscribe-ui.css
index b3c0b37a2b..51eb7a1174 100644
--- a/application/palemoon/themes/linux/feeds/subscribe-ui.css
+++ b/application/palemoon/themes/linux/feeds/subscribe-ui.css
@@ -7,17 +7,17 @@
 }
 
 .handlersMenuPopup > menuitem {
-  -moz-padding-start: 23px;
+  padding-inline-start: 23px;
 }
 
 .handlersMenuPopup > menuitem.menuitem-iconic {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .handlersMenuPopup > .menuitem-iconic  > .menu-iconic-left {
   display: -moz-box;
   min-width: 16px;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 .chooseApplicationMenuItem {
diff --git a/application/palemoon/themes/linux/feeds/subscribe.css b/application/palemoon/themes/linux/feeds/subscribe.css
index dd1e24eef8..ac5de58650 100644
--- a/application/palemoon/themes/linux/feeds/subscribe.css
+++ b/application/palemoon/themes/linux/feeds/subscribe.css
@@ -10,7 +10,7 @@ html {
 #feedBody {
   border: 1px solid THreeDShadow;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   margin: 2em auto;
   background: -moz-Field;
 }
@@ -25,9 +25,9 @@ html {
 #feedHeader {  
   margin-top: 4.9em;
   margin-bottom: 1em;
-  -moz-margin-start: 1.4em;
-  -moz-margin-end: 1em;
-  -moz-padding-start: 2.9em;
+  margin-inline-start: 1.4em;
+  margin-inline-end: 1em;
+  padding-inline-start: 2.9em;
   font-size: 110%;
   color: InfoText;
 }
@@ -54,12 +54,12 @@ html {
 
 #feedHeader[firstrun="true"] #feedIntroText {
   padding-top: 0.1em;
-  -moz-padding-start: 0.6em;
+  padding-inline-start: 0.6em;
   display: block;
 }
 
 #feedHeader[firstrun="true"] > #feedSubscribeLine {
-  -moz-padding-start: 1.8em;
+  padding-inline-start: 1.8em;
 }
 
 #feedSubscribeLine {
@@ -99,8 +99,8 @@ h2 {
 
 #feedTitleLink {
   float: right;
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
 }
@@ -110,15 +110,15 @@ a[href] img {
 }
 
 #feedTitleContainer {
-  -moz-margin-start: 0;
-  -moz-margin-end: .6em;
+  margin-inline-start: 0;
+  margin-inline-end: .6em;
   margin-top: 0;
   margin-bottom: 0;
 }
 
 #feedTitleImage {
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
   max-width: 300px;
diff --git a/application/palemoon/themes/linux/pageInfo.css b/application/palemoon/themes/linux/pageInfo.css
index 49ae4938a3..805c2fa458 100644
--- a/application/palemoon/themes/linux/pageInfo.css
+++ b/application/palemoon/themes/linux/pageInfo.css
@@ -75,7 +75,7 @@ textbox {
 }
 
 textbox.header {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 .iframe {
@@ -94,7 +94,7 @@ textbox[disabled] {
 
 /* General Tab */
 #generalPanel > #titletext {
-  -moz-margin-start: 5px;
+  margin-inline-start: 5px;
 }
 
 groupbox.collapsable caption .caption-icon { 
@@ -102,8 +102,8 @@ groupbox.collapsable caption .caption-icon {
   height: 9px;
   background-repeat: no-repeat;
   background-position: center;
-  -moz-margin-start: 1px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 1px;
+  margin-inline-end: 3px;
   background-image: url("chrome://global/skin/tree/twisty-open.png");
 }
 
@@ -121,13 +121,13 @@ groupbox tree {
 }
 
 groupbox.treebox .groupbox-body { 
-  -moz-margin-start: 5px;
-  -moz-margin-end: 1px;
+  margin-inline-start: 5px;
+  margin-inline-end: 1px;
   padding-top: 0;
 }
 
 #securityBox description { 
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 #general-security-identity {
@@ -182,8 +182,8 @@ treechildren::-moz-tree-cell-text(broken) {
 #feedListbox richlistitem {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
   color: -moz-FieldText;
@@ -229,8 +229,8 @@ treechildren::-moz-tree-cell-text(broken) {
 .permission {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
 }
diff --git a/application/palemoon/themes/linux/permissions/aboutPermissions.css b/application/palemoon/themes/linux/permissions/aboutPermissions.css
index 386e167e68..17634e8fa7 100644
--- a/application/palemoon/themes/linux/permissions/aboutPermissions.css
+++ b/application/palemoon/themes/linux/permissions/aboutPermissions.css
@@ -40,7 +40,7 @@
 .site-favicon {
   height: 16px;
   width: 16px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
 }
 
@@ -57,7 +57,7 @@
 
 #site-description {
   font-size: 125%;
-  -moz-margin-start: 6px; /* to match button margin */
+  margin-inline-start: 6px; /* to match button margin */
 }
 
 #site-label {
@@ -69,7 +69,7 @@
 #defaults-description {
   font-size: 125%;
   font-weight: bold;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .pref-item {
@@ -79,7 +79,7 @@
 .pref-icon {
   width: 36px;
   height: 36px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .pref-icon[type="password"] {
diff --git a/application/palemoon/themes/linux/places/editBookmarkOverlay.css b/application/palemoon/themes/linux/places/editBookmarkOverlay.css
index f1f6210b4d..dba6ba655d 100644
--- a/application/palemoon/themes/linux/places/editBookmarkOverlay.css
+++ b/application/palemoon/themes/linux/places/editBookmarkOverlay.css
@@ -24,7 +24,7 @@
 .expander-down {
   min-width: 0;
   padding: 2px 0;
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .expander-up > .button-box {
diff --git a/application/palemoon/themes/linux/places/organizer.css b/application/palemoon/themes/linux/places/organizer.css
index cabeebbca7..16ead7212f 100644
--- a/application/palemoon/themes/linux/places/organizer.css
+++ b/application/palemoon/themes/linux/places/organizer.css
@@ -47,7 +47,7 @@
 }
 
 #placesMenu > menu {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
   -moz-binding: url("chrome://browser/skin/places/organizer.xml#toolbarbutton-dropdown");
   -moz-appearance: toolbarbutton;
   color: -moz-DialogText;
@@ -74,7 +74,7 @@
 }
 
 #infoBoxExpanderLabel {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 #searchModifiers {
diff --git a/application/palemoon/themes/linux/preferences/applications.css b/application/palemoon/themes/linux/preferences/applications.css
index c9d1b8c8ae..8b63dfdab6 100644
--- a/application/palemoon/themes/linux/preferences/applications.css
+++ b/application/palemoon/themes/linux/preferences/applications.css
@@ -11,18 +11,18 @@
 .actionsMenu {
   margin-top: -1px;
   margin-bottom: -1px;
-  -moz-margin-start: -1px;
-  -moz-margin-end: 0;
+  margin-inline-start: -1px;
+  margin-inline-end: 0;
 }
 
 .typeIcon,
 .actionIcon {
-  -moz-margin-start: 3px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 3px;
+  margin-inline-end: 3px;
 }
 
 richlistitem label {
-  -moz-margin-start: 1px;
+  margin-inline-start: 1px;
   margin-top: 2px;
 }
 
@@ -51,16 +51,16 @@ menuitem[appHandlerIcon="plugin"] {
 }
 
 .actionsMenu .menulist-icon {
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
   height: 16px;
   width: 16px;
 }
 
 .actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  -moz-padding-start: 0;
-  -moz-padding-end: 4px !important;
+  padding-inline-start: 0;
+  padding-inline-end: 4px !important;
 }
 
 .actionsMenu > menupopup > menuitem {
-  -moz-padding-start: 3px;
+  padding-inline-start: 3px;
 }
diff --git a/application/palemoon/themes/linux/sanitizeDialog.css b/application/palemoon/themes/linux/sanitizeDialog.css
index 96cf3bcea8..28d4e7eb30 100644
--- a/application/palemoon/themes/linux/sanitizeDialog.css
+++ b/application/palemoon/themes/linux/sanitizeDialog.css
@@ -3,12 +3,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #sanitizeDurationChoice {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 /* Align the duration label with the warning box and item list */
 #sanitizeDurationLabel {
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 
@@ -56,15 +56,15 @@
   padding: 0;
   margin-top: 6px;
   margin-bottom: 6px;
-  -moz-margin-start: -6px;
-  -moz-margin-end: 0;
+  margin-inline-start: -6px;
+  margin-inline-end: 0;
 }
 
 .expander-up,
 .expander-down {
   min-width: 0;
   padding: 2px 0;
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .expander-up {
@@ -86,8 +86,8 @@
 
 /* Make the item list the same width as the warning box */
 #itemList {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 /* Without this a useless scrollbar appears in the listbox when its rows
@@ -100,8 +100,8 @@
 
 /* Align the last dialog button with the end of the warning box */
 .prefWindow-dlgbuttons {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 .dialog-button[dlgtype="accept"] {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
diff --git a/application/palemoon/themes/linux/searchbar.css b/application/palemoon/themes/linux/searchbar.css
index cb6ecffcc0..0352e27a7c 100644
--- a/application/palemoon/themes/linux/searchbar.css
+++ b/application/palemoon/themes/linux/searchbar.css
@@ -26,7 +26,7 @@
   height: 16px;
   width: 16px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
 }
 
 .searchbar-engine-button {
@@ -41,7 +41,7 @@
 .searchbar-engine-button > .button-box {
   -moz-appearance: none;
   padding: 2px 0;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
   border: 0;
 }
 
diff --git a/application/palemoon/themes/linux/statusbar/overlay.css b/application/palemoon/themes/linux/statusbar/overlay.css
index 2351aac4c3..d326bac3f8 100644
--- a/application/palemoon/themes/linux/statusbar/overlay.css
+++ b/application/palemoon/themes/linux/statusbar/overlay.css
@@ -57,7 +57,7 @@ toolbar[mode="icons"] #status4evar-download-button[forcelabel="true"] > label
 {
 	margin: 0px 2px !important;
 	margin-top: -1px !important;
-	-moz-margin-start: 4px !important;
+	margin-inline-start: 4px !important;
 }
 
 /*
@@ -81,7 +81,7 @@ splitter.status4evar-status-splitter
 
 #notification-popup-box
 {
-	-moz-margin-start: -1px;
+	margin-inline-start: -1px;
 }
 
 #urlbar .urlbar-over-link-box
diff --git a/application/palemoon/themes/linux/syncCommon.css b/application/palemoon/themes/linux/syncCommon.css
index 9a84cebee9..9ad7214aae 100644
--- a/application/palemoon/themes/linux/syncCommon.css
+++ b/application/palemoon/themes/linux/syncCommon.css
@@ -8,7 +8,7 @@
 }
 
 .statusIcon {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   max-height: 16px;
   max-width: 16px;
 }
diff --git a/application/palemoon/themes/linux/syncSetup.css b/application/palemoon/themes/linux/syncSetup.css
index 4c6518a1b7..f84fd08ad0 100644
--- a/application/palemoon/themes/linux/syncSetup.css
+++ b/application/palemoon/themes/linux/syncSetup.css
@@ -99,7 +99,7 @@ description > .text-link:focus {
 }
 
 .inputColumn {
-  -moz-margin-end: 2px
+  margin-inline-end: 2px
 }
 
 .pin {
diff --git a/application/palemoon/themes/osx/aboutCertError.css b/application/palemoon/themes/osx/aboutCertError.css
index dbb3530253..100bb3d3bb 100644
--- a/application/palemoon/themes/osx/aboutCertError.css
+++ b/application/palemoon/themes/osx/aboutCertError.css
@@ -33,7 +33,7 @@ h2 {
   border-radius: 10px;
   box-shadow: 0px 0px 8px red;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: url("chrome://global/skin/icons/sslWarning.png") left 0 no-repeat -moz-Field;
   background-origin: content-box;
 }
@@ -43,16 +43,16 @@ h2 {
 }
 
 #errorTitle {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorLongContent {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 .expander > button {
-  -moz-padding-start: 20px;
-  -moz-margin-start: -20px;
+  padding-inline-start: 20px;
+  margin-inline-start: -20px;
   background: url("chrome://browser/skin/aboutCertError_sectionExpanded.png") left center no-repeat;
   border: none;
   font: inherit;
diff --git a/application/palemoon/themes/osx/aboutPrivateBrowsing.css b/application/palemoon/themes/osx/aboutPrivateBrowsing.css
index cd6026b8ea..35843adce6 100644
--- a/application/palemoon/themes/osx/aboutPrivateBrowsing.css
+++ b/application/palemoon/themes/osx/aboutPrivateBrowsing.css
@@ -21,7 +21,7 @@ body.normal > #errorPageContainer {
 }
 
 #startPrivateBrowsingDesc > button {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #footerDesc > p {
@@ -30,7 +30,7 @@ body.normal > #errorPageContainer {
 
 #moreInfo {
   font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
-  -moz-padding-start: 25px;
+  padding-inline-start: 25px;
   background: url("chrome://global/skin/icons/information-16.png") no-repeat top left;
 }
 
diff --git a/application/palemoon/themes/osx/aboutSyncTabs.css b/application/palemoon/themes/osx/aboutSyncTabs.css
index 4f21a9d408..1fcd8304f7 100644
--- a/application/palemoon/themes/osx/aboutSyncTabs.css
+++ b/application/palemoon/themes/osx/aboutSyncTabs.css
@@ -22,18 +22,18 @@
   margin-top: 4px;
   width: 45em;
   height: 32px;
-  -moz-margin-start: 2em;
-  -moz-margin-end: 2em;
+  margin-inline-start: 2em;
+  margin-inline-end: 2em;
 }
 
 #tabsListHeading {
   font-size: 140%;
   font-weight: bold;
-  -moz-margin-start: 40px;
+  margin-inline-start: 40px;
 }
 
 richlistitem {
-  -moz-margin-end: 2em;
+  margin-inline-end: 2em;
 }
 
 richlistitem[selected="true"],
@@ -46,7 +46,7 @@ richlistitem[type="tab"] {
   border: #999999 1px solid !important;
   padding: 2px 5px;
   margin-bottom: 4px;
-  -moz-margin-start: 4em;
+  margin-inline-start: 4em;
   border-radius: 6px;
   background-color: menu;
   width: 44em;
@@ -64,7 +64,7 @@ richlistitem[type="tab"][selected="true"] {
 richlistitem[type="client"] {
   min-height: 2em;
   color: #000000;
-  -moz-margin-start: 2em;
+  margin-inline-start: 2em;
   margin-top: 2px;
   margin-bottom: 3px;
   width: 42em;
@@ -96,6 +96,6 @@ richlistitem.desktop[type="client"] {
 }
 
 .tabIcon {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
   padding-top: 2px;
 }
diff --git a/application/palemoon/themes/osx/autocomplete.css b/application/palemoon/themes/osx/autocomplete.css
index a50dbd8239..7f63bef198 100644
--- a/application/palemoon/themes/osx/autocomplete.css
+++ b/application/palemoon/themes/osx/autocomplete.css
@@ -129,15 +129,15 @@ treechildren.private-autocomplete-treebody::-moz-tree-cell-text(selected) {
   width: 16px; 
   height: 16px;
   margin-bottom: -1px;
-  -moz-margin-start: 7px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 7px;
+  margin-inline-end: 5px;
 }
 
 .ac-type-icon {
   width: 16px;
   height: 16px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 4px;
+  margin-inline-start: 6px;
+  margin-inline-end: 4px;
 }
 
 .ac-url-box > .ac-site-icon,
diff --git a/application/palemoon/themes/osx/browser.css b/application/palemoon/themes/osx/browser.css
index d1b0608a1a..d2579837c0 100644
--- a/application/palemoon/themes/osx/browser.css
+++ b/application/palemoon/themes/osx/browser.css
@@ -225,8 +225,8 @@ toolbarbutton.bookmark-item {
   list-style-image: url("chrome://browser/skin/places/folderDropArrow.png");
   -moz-image-region: rect(0, 7px, 5px, 0);
   margin-top: 1px;
-  -moz-margin-start: 3px;
-  -moz-margin-end: -2px;
+  margin-inline-start: 3px;
+  margin-inline-end: -2px;
 }
 
 @media (min-resolution: 2dppx) {
@@ -276,7 +276,7 @@ toolbarbutton.bookmark-item[open="true"] {
 
 toolbarbutton.bookmark-item > menupopup {
   margin-top: 2px;
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 .bookmark-item > .toolbarbutton-icon {
@@ -287,7 +287,7 @@ toolbarbutton.bookmark-item > menupopup {
 
 .bookmark-item > .toolbarbutton-icon[label]:not([label=""]),
 .bookmark-item > .toolbarbutton-icon[type="menu"] {
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 
 .bookmark-item[container] {
@@ -446,7 +446,7 @@ toolbar[brighttext] .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
 
 .toolbarbutton-1 > .toolbarbutton-icon,
 .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 toolbar[mode=full] .toolbarbutton-1:not([type=menu-button]) {
@@ -488,11 +488,11 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-padding-start: 0;
+  padding-inline-start: 0;
   -moz-box-align: center;
 }
 
@@ -522,15 +522,15 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 
 @navbarLargeIcons@ .toolbarbutton-1[type=menu]:not(#back-button):not(#forward-button):not(#feed-button) > .toolbarbutton-icon,
 @navbarLargeIcons@ .toolbarbutton-1[type=menu] > .toolbarbutton-text /* hack for add-ons that forcefully display the label */ {
-  -moz-padding-end: 17px;
+  padding-inline-end: 17px;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  -moz-margin-start: -15px;
+  margin-inline-start: -15px;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
@@ -542,7 +542,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
   display: -moz-box;
   width: 1px;
   height: 18px;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
   background-image: linear-gradient(var(--toolbarbutton-border-color) 0, var(--toolbarbutton-border-color) 18px);
   background-clip: padding-box;
   background-position: center;
@@ -603,7 +603,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 @navbarLargeIcons@ .toolbarbutton-1:-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker:not([disabled]) > .dropmarker-icon {
-  -moz-border-start-color: hsla(210,54%,20%,.35);
+  border-inline-start-color: hsla(210,54%,20%,.35);
 }
 
 @navbarLargeIcons@ .toolbarbutton-1[checked]:not(:active):hover > .toolbarbutton-icon {
@@ -675,7 +675,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 @conditionalForwardWithUrlbar@ > #forward-button > .toolbarbutton-icon {
   /*mask: url(keyhole-forward-mask.svg#mask); XXX: this regresses twinopen */
   clip-path: url(chrome://browser/content/browser.xul#osx-keyhole-forward-clip-path);
-  -moz-margin-start: -9px !important;
+  margin-inline-start: -9px !important;
   border-left-style: none;
   border-radius: 0;
   padding-left: 7px;
@@ -694,8 +694,8 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
   -moz-image-region: rect(18px, 20px, 38px, 0);
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 0;
+  padding-inline-start: 5px;
+  padding-inline-end: 0;
   position: relative;
   z-index: 1;
   border-radius: 0 10000px 10000px 0;
@@ -867,7 +867,7 @@ toolbar[brighttext] #bookmarks-menu-button.bookmark-item {
 
 #urlbar {
   width: 7em;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 @media (-moz-mac-lion-theme) {
@@ -886,13 +886,13 @@ toolbar[brighttext] #bookmarks-menu-button.bookmark-item {
 
 @conditionalForwardWithUrlbar@ + #urlbar-container {
   padding-left: @conditionalForwardWithUrlbarWidth@px;
-  -moz-margin-start: -@conditionalForwardWithUrlbarWidth@px;
+  margin-inline-start: -@conditionalForwardWithUrlbarWidth@px;
   position: relative;
   pointer-events: none;
 }
 
 @conditionalForwardWithUrlbar@ + #urlbar-container > #urlbar {
-  -moz-border-start: none;
+  border-inline-start: none;
   margin-left: 0;
   pointer-events: all;
 }
@@ -942,7 +942,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 .urlbar-input-box {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   min-width: 4em;
 }
 
@@ -970,25 +970,25 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar-search-splitter {
   min-width: 6px;
-  -moz-margin-start: -3px;
+  margin-inline-start: -3px;
   border: none;
   background: transparent;
 }
 
 #urlbar-search-splitter + #urlbar-container > #urlbar ,
 #urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #urlbar-display-box {
-  -moz-border-end: 1px solid #AAA;
-  -moz-margin-end: 3px;
+  border-inline-end: 1px solid #AAA;
+  margin-inline-end: 3px;
 }
 
 #urlbar-display {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   color: GrayText;
 }
 
@@ -1010,7 +1010,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 #notification-popup-box:not([hidden]) + #identity-box {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   border-radius: 0;
 }
 
@@ -1020,7 +1020,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity {
   color: hsl(92,100%,30%);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: -moz-linear-gradient(hsla(92,81%,16%,0),
     hsla(92,81%,16%,.08) 25%,
     hsla(92,81%,16%,.08) 75%,
@@ -1031,7 +1031,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain {
   color: rgb(0,79,168);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: -moz-linear-gradient(rgba(0,79,168,0),
     rgba(0,79,168,.08) 25%,
     rgba(0,79,168,.08) 75%,
@@ -1060,8 +1060,8 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 #identity-icon-labels {
-  -moz-padding-start: 2px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 2px;
+  padding-inline-end: 5px;
 }
 
 /* Address bar shading for SSL */
@@ -1125,14 +1125,14 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
   height: 16px;
   margin-top: 1px;
   margin-bottom: 1px;
-  -moz-margin-start: 3px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 3px;
+  margin-inline-end: 2px;
   list-style-image: url(chrome://browser/skin/identity-icons-generic.png);
   -moz-image-region: rect(0, 16px, 16px, 0);
 }
 
 @conditionalForwardWithUrlbar@ + #urlbar-container > #urlbar > #identity-box > #page-proxy-favicon {
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
 }
 
 /* Since we already have a padlock, always use the generic icon until the favicon loads
@@ -1450,7 +1450,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
 }
 
 .editBookmarkPanelBottomButton:last-child {
-  -moz-margin-start: 8px;
+  margin-inline-start: 8px;
 }
 
 /* The following elements come from editBookmarkOverlay.xul. Styling that's
@@ -1475,7 +1475,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
 #editBMPanel_newFolderButton {
   -moz-appearance: none;
   border: 0 solid #a5a5a5;
-  -moz-border-end-width: 1px;
+  border-inline-end-width: 1px;
   padding: 0 9px;
   margin: 0;
   min-width: 21px;
@@ -1506,8 +1506,8 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
   min-height: 22px;
   padding-top: 2px;
   padding-bottom: 1px;
-  -moz-padding-start: 8px;
-  -moz-padding-end: 4px;
+  padding-inline-start: 8px;
+  padding-inline-end: 4px;
 }
 
 #editBMPanel_folderMenuList:-moz-focusring {
@@ -1526,7 +1526,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
   border: 0;
   margin: 0;
   padding: 0;
-  -moz-padding-end: 4px;
+  padding-inline-end: 4px;
   width: 7px;
 }
 
@@ -1570,7 +1570,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
 #editBookmarkPanel .expander-down {
   @hudButton@
   margin: 0;
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   min-width: 27px;
   min-height: 22px;
 }
@@ -1634,7 +1634,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
 }
 
 #sidebar-title {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 /* ::::: throbber ::::: */
@@ -1709,12 +1709,12 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
   /* Hide the transparent top border by default */
   margin-top: -1px;
   /* Reduce the gap between the tabs */
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   box-shadow: var(--tab-box-shadow);
 }
 
 .tabbrowser-tab {
-  -moz-padding-end: 3px;
+  padding-inline-end: 3px;
 }
 
 /* Override the default (globally-set) tab width values; increase
@@ -1822,8 +1822,8 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
   width: 16px;
   height: 16px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  -moz-margin-start: 2px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 2px;
+  margin-inline-end: 3px;
 }
 
 .tab-throbber {
@@ -1836,8 +1836,8 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
 
 .tab-throbber[pinned],
 .tab-icon-image[pinned] {
-  -moz-margin-start: 5px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 5px;
+  margin-inline-end: 5px;
 }
 
 /* tabbrowser-tab focus ring */
@@ -1870,7 +1870,7 @@ richlistitem[type~="action"][actiontype="switchtab"][selected="true"] > .ac-url-
   
 /* Tab sound indicator */
 .tab-icon-sound {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   width: 16px;
   height: 16px;
   padding: 0;
@@ -2083,14 +2083,14 @@ toolbar[brighttext] .tabs-closebutton {
 }
   
 .tabs-closebutton > .toolbarbutton-icon {
-  -moz-margin-end: 0px !important;
-  -moz-padding-end: 2px !important;
-  -moz-padding-start: 2px !important;
+  margin-inline-end: 0px !important;
+  padding-inline-end: 2px !important;
+  padding-inline-start: 2px !important;
 }
 
 #sidebar-throbber[loading="true"] {
   list-style-image: url("chrome://global/skin/icons/loading_16.png");
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 /* Pale Moon: Feed icon */
@@ -2142,7 +2142,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 .menupopup-drop-indicator {
   list-style-image: none;
   height: 2px;
-  -moz-margin-end: -4em;
+  margin-inline-end: -4em;
   background-color: Highlight;
 }
 
@@ -2168,13 +2168,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 /* Popup Body Text */
 .identity-popup-description {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 2px 0 4px;
 }
 
 .identity-popup-label {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 0;
 }
 
@@ -2208,7 +2208,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption ,
 #identity-popup-content-box.verifiedDomain > #identity-popup-encryption {
   margin-top: 10px;
-  -moz-margin-start: -24px;
+  margin-inline-start: -24px;
 }
 
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption > vbox > #identity-popup-encryption-icon ,
@@ -2219,13 +2219,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-more-info-button {
   margin-top: 6px;
   margin-bottom: 0;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 .popup-notification-icon {
   width: 64px;
   height: 64px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .popup-notification-icon[popupid="geolocation"] {
@@ -2259,8 +2259,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 
 .popup-progress-label,
 .popup-progress-meter {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 .popup-progress-cancel {
@@ -2321,7 +2321,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   border-width: 0 8px 0 0;
   border-style: solid;
   border-image: url("chrome://browser/skin/urlbar-arrow.png") 0 8 0 0 fill;
-  -moz-margin-end: -8px;
+  margin-inline-end: -8px;
 }
 
 @conditionalForwardWithUrlbar@[forwarddisabled] + #urlbar-container > #urlbar > #notification-popup-box {
@@ -2590,8 +2590,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 }
 
 #allTabs-filter {
-  -moz-margin-start: 24px;
-  -moz-margin-end: 0;
+  margin-inline-start: 24px;
+  margin-inline-end: 0;
 }
 
 #allTabs-tab-close-button > .toolbarbutton-icon {
@@ -2609,10 +2609,10 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   height: 22px;
   padding-top: 1px;
   padding-bottom: 5px;
-  -moz-padding-start: 1px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 1px;
+  padding-inline-end: 5px;
   margin-top: -2px;
-  -moz-margin-start: -2px;
+  margin-inline-start: -2px;
   border-bottom-right-radius: 4px;
 }
 
@@ -2744,7 +2744,7 @@ toolbar[brighttext] #addonbar-closebutton {
   text-shadow: none;
   background-image: linear-gradient(#B4211B, #8A1915);
   border-radius: 1px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 %endif
 
@@ -2765,7 +2765,7 @@ toolbar[brighttext] #addonbar-closebutton {
 }
 
 .toolbarbutton-badge-stack > .toolbarbutton-icon[label]:not([label=""]) {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 @navbarLargeIcons@ *|* > .toolbarbutton-badge[badge]:not([badge=""])::after {
@@ -2818,12 +2818,12 @@ toolbar[brighttext] #addonbar-closebutton {
 }
 
 #main-window[privatebrowsingmode=temporary][inFullscreen] #nav-bar[tabsontop=false] {
-  -moz-padding-end: 50px !important;
+  padding-inline-end: 50px !important;
 }
 
 @media (-moz-mac-lion-theme) {
   #main-window[privatebrowsingmode=temporary][inFullscreen] #TabsToolbar[tabsontop=true] {
-  -moz-padding-end: 50px;
+  padding-inline-end: 50px;
   }
 }
 
@@ -2833,6 +2833,6 @@ toolbar[brighttext] #addonbar-closebutton {
   }
 
   #main-window[privatebrowsingmode=temporary][inFullscreen][tabsontop=true] #window-controls {
-  -moz-padding-end: 50px;
+  padding-inline-end: 50px;
   }
 }
diff --git a/application/palemoon/themes/osx/downloads/allDownloadsViewOverlay.css b/application/palemoon/themes/osx/downloads/allDownloadsViewOverlay.css
index eb99f4c1fd..0cfc5f81be 100644
--- a/application/palemoon/themes/osx/downloads/allDownloadsViewOverlay.css
+++ b/application/palemoon/themes/osx/downloads/allDownloadsViewOverlay.css
@@ -14,7 +14,7 @@
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* explicitly size the icon, so size doesn't vary on hidpi systems */
   height: 32px;
   width: 32px;
diff --git a/application/palemoon/themes/osx/downloads/downloads.css b/application/palemoon/themes/osx/downloads/downloads.css
index 073f529cb1..2f9733a98e 100644
--- a/application/palemoon/themes/osx/downloads/downloads.css
+++ b/application/palemoon/themes/osx/downloads/downloads.css
@@ -57,7 +57,7 @@
 #downloadsSummary,
 richlistitem[type="download"] {
   height: 7em;
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
   color: inherit;
 }
 
@@ -104,7 +104,7 @@ richlistitem[type="download"]:first-child {
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* Prevent flickering when changing states. */
   height: 32px;
   width: 32px;
@@ -378,7 +378,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   background-image: linear-gradient(#505050, #575757);
   border: 1px solid;
   border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  -moz-border-start: none;
+  border-inline-start: none;
   border-radius: 0 2px 2px 0;
 }
 
diff --git a/application/palemoon/themes/osx/engineManager.css b/application/palemoon/themes/osx/engineManager.css
index 18817cd4f2..c6d42cce29 100644
--- a/application/palemoon/themes/osx/engineManager.css
+++ b/application/palemoon/themes/osx/engineManager.css
@@ -5,8 +5,8 @@
 %endif
 
 #engineList treechildren::-moz-tree-image(engineName) {
-  -moz-margin-end: 4px;
-  -moz-margin-start: 1px;
+  margin-inline-end: 4px;
+  margin-inline-start: 1px;
   width: 16px;
   height: 16px;
 }
diff --git a/application/palemoon/themes/osx/feeds/subscribe-ui.css b/application/palemoon/themes/osx/feeds/subscribe-ui.css
index 8ca53283bd..f21c037e67 100644
--- a/application/palemoon/themes/osx/feeds/subscribe-ui.css
+++ b/application/palemoon/themes/osx/feeds/subscribe-ui.css
@@ -7,17 +7,17 @@
 }
 
 .handlersMenuPopup > menuitem {
-  -moz-padding-start: 23px;
+  padding-inline-start: 23px;
 }
 
 .handlersMenuPopup > menuitem.menuitem-iconic {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .handlersMenuPopup > .menuitem-iconic  > .menu-iconic-left {
   display: -moz-box;
   min-width: 16px;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 .chooseApplicationMenuItem {
diff --git a/application/palemoon/themes/osx/feeds/subscribe.css b/application/palemoon/themes/osx/feeds/subscribe.css
index 780a7f8b2f..3a93c64563 100644
--- a/application/palemoon/themes/osx/feeds/subscribe.css
+++ b/application/palemoon/themes/osx/feeds/subscribe.css
@@ -10,7 +10,7 @@ html {
 #feedBody {
   border: 1px solid THreeDShadow;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   margin: 2em auto;
   background: -moz-Field;
 }
@@ -25,9 +25,9 @@ html {
 #feedHeader {  
   margin-top: 4.9em;
   margin-bottom: 1em;
-  -moz-margin-start: 1.4em;
-  -moz-margin-end: 1em;
-  -moz-padding-start: 2.9em;
+  margin-inline-start: 1.4em;
+  margin-inline-end: 1em;
+  padding-inline-start: 2.9em;
   font-size: 110%;
   color: InfoText;
 }
@@ -54,12 +54,12 @@ html {
 
 #feedHeader[firstrun="true"] #feedIntroText {
   padding-top: 0.1em;
-  -moz-padding-start: 0.6em;
+  padding-inline-start: 0.6em;
   display: block;
 }
 
 #feedHeader[firstrun="true"] > #feedSubscribeLine {
-  -moz-padding-start: 1.8em;
+  padding-inline-start: 1.8em;
 }
 
 #feedSubscribeLine {
@@ -95,8 +95,8 @@ h2 {
 
 #feedTitleLink {
   float: right;
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
 }
@@ -106,15 +106,15 @@ a[href] img {
 }
 
 #feedTitleContainer {
-  -moz-margin-start: 0;
-  -moz-margin-end: .6em;
+  margin-inline-start: 0;
+  margin-inline-end: .6em;
   margin-top: 0;
   margin-bottom: 0;
 }
 
 #feedTitleImage {
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
   max-width: 300px;
diff --git a/application/palemoon/themes/osx/pageInfo.css b/application/palemoon/themes/osx/pageInfo.css
index f205b57bbe..f958d9ce2f 100644
--- a/application/palemoon/themes/osx/pageInfo.css
+++ b/application/palemoon/themes/osx/pageInfo.css
@@ -6,7 +6,7 @@
 
 /* View buttons */
 #viewGroup {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
 }
 
 #viewGroup > radio {
@@ -31,7 +31,7 @@
 
 #topBar {
   border-bottom: 2px groove ThreeDFace;
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   background-color: -moz-Field;
   color: -moz-FieldText;
 }
@@ -98,7 +98,7 @@ textbox {
 }
 
 textbox.header {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 .iframe {
@@ -121,8 +121,8 @@ groupbox.collapsable caption .caption-icon {
   height: 9px;
   background-repeat: no-repeat;
   background-position: center;
-  -moz-margin-start: 2px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 2px;
+  margin-inline-end: 2px;
   background-image: url("chrome://global/skin/tree/twisty-open.png");
 }
 
@@ -142,7 +142,7 @@ groupbox tree {
 }
 
 #securityBox description { 
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 #general-security-identity {
@@ -187,8 +187,8 @@ treechildren::-moz-tree-cell-text(broken) {
 #feedListbox richlistitem {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
 }
@@ -225,8 +225,8 @@ treechildren::-moz-tree-cell-text(broken) {
 .permission {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
 }
diff --git a/application/palemoon/themes/osx/permissions/aboutPermissions.css b/application/palemoon/themes/osx/permissions/aboutPermissions.css
index f9a4a88af2..4886da2be9 100644
--- a/application/palemoon/themes/osx/permissions/aboutPermissions.css
+++ b/application/palemoon/themes/osx/permissions/aboutPermissions.css
@@ -43,7 +43,7 @@
 .site-favicon {
   height: 16px;
   width: 16px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
 }
 
@@ -60,7 +60,7 @@
 
 #site-description {
   font-size: 125%;
-  -moz-margin-start: 6px; /* to match button margin */
+  margin-inline-start: 6px; /* to match button margin */
 }
 
 #site-label {
@@ -72,7 +72,7 @@
 #defaults-description {
   font-size: 125%;
   font-weight: bold;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .pref-item {
@@ -82,7 +82,7 @@
 .pref-icon {
   width: 36px;
   height: 36px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .pref-icon[type="password"] {
diff --git a/application/palemoon/themes/osx/places/organizer.css b/application/palemoon/themes/osx/places/organizer.css
index bfa35dc9e1..ffcd6c5237 100644
--- a/application/palemoon/themes/osx/places/organizer.css
+++ b/application/palemoon/themes/osx/places/organizer.css
@@ -19,7 +19,7 @@
 /* Toolbar */
 #placesToolbar {
   padding: 3px;
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
 }
 
 #placesToolbar > toolbarbutton[disabled] > .toolbarbutton-icon {
@@ -78,7 +78,7 @@
 }
 
 #infoBoxExpanderLabel {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 #searchFilter {
@@ -94,8 +94,8 @@
 }
 
 #clearDownloadsButton {
-  -moz-padding-start: 9px;
-  -moz-padding-end: 9px;
+  padding-inline-start: 9px;
+  padding-inline-end: 9px;
 }
 
 /* hover-over/open button highlighting */
diff --git a/application/palemoon/themes/osx/places/places.css b/application/palemoon/themes/osx/places/places.css
index 4243779522..b30c56bd85 100644
--- a/application/palemoon/themes/osx/places/places.css
+++ b/application/palemoon/themes/osx/places/places.css
@@ -142,5 +142,5 @@ treechildren::-moz-tree-cell-text(cutting) {
 #viewButton > .button-box > .button-menu-dropmarker {
   height: auto;
   width: auto;
-  -moz-margin-end: -3px;
+  margin-inline-end: -3px;
 }
diff --git a/application/palemoon/themes/osx/preferences/applications.css b/application/palemoon/themes/osx/preferences/applications.css
index 80699b4635..fdf5614772 100644
--- a/application/palemoon/themes/osx/preferences/applications.css
+++ b/application/palemoon/themes/osx/preferences/applications.css
@@ -11,18 +11,18 @@
 .actionsMenu {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: -2px;
-  -moz-margin-end: 0;
+  margin-inline-start: -2px;
+  margin-inline-end: 0;
 }
 
 .typeIcon,
 .actionIcon {
-  -moz-margin-start: 3px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 3px;
+  margin-inline-end: 3px;
 }
 
 richlistitem label {
-  -moz-margin-start: 1px;
+  margin-inline-start: 1px;
   margin-top: 2px;
 }
 
@@ -51,14 +51,14 @@ menuitem[appHandlerIcon="plugin"] {
 }
 
 .actionsMenu .menulist-icon {
-  -moz-margin-end: 3px;
+  margin-inline-end: 3px;
 }
 
 .actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  -moz-padding-start: 0px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 0px;
+  padding-inline-end: 2px;
 }
 
 .actionsMenu > menupopup > menuitem {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
 }
diff --git a/application/palemoon/themes/osx/sanitizeDialog.css b/application/palemoon/themes/osx/sanitizeDialog.css
index 40dc4b2512..2fbedeb76a 100644
--- a/application/palemoon/themes/osx/sanitizeDialog.css
+++ b/application/palemoon/themes/osx/sanitizeDialog.css
@@ -3,12 +3,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #sanitizeDurationChoice {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 /* Align the duration label with the warning box and item list */
 #sanitizeDurationLabel {
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 
@@ -79,15 +79,15 @@
 
 /* Make the item list the same width as the warning box */
 #itemList {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 
 /* Align the last dialog button with the end of the warning box */
 .prefWindow-dlgbuttons {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 .dialog-button[dlgtype="cancel"] {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
diff --git a/application/palemoon/themes/osx/searchbar.css b/application/palemoon/themes/osx/searchbar.css
index e770ab6a9f..e21101ba4f 100644
--- a/application/palemoon/themes/osx/searchbar.css
+++ b/application/palemoon/themes/osx/searchbar.css
@@ -28,7 +28,7 @@
   min-width: 0;
   margin: 0;
   padding: 0;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
   -moz-box-align: center;
   background: none;
   border: none;
diff --git a/application/palemoon/themes/osx/statusbar/overlay.css b/application/palemoon/themes/osx/statusbar/overlay.css
index ab1cc8f930..d54334206b 100644
--- a/application/palemoon/themes/osx/statusbar/overlay.css
+++ b/application/palemoon/themes/osx/statusbar/overlay.css
@@ -60,7 +60,7 @@
 toolbar[mode="icons"] #status4evar-download-button[forcelabel="true"] > label
 {
 	margin: 0px 2px !important;
-	-moz-margin-start: 3px !important;
+	margin-inline-start: 3px !important;
 }
 
 /*
diff --git a/application/palemoon/themes/osx/syncCommon.css b/application/palemoon/themes/osx/syncCommon.css
index f0beae0d53..838788cd52 100644
--- a/application/palemoon/themes/osx/syncCommon.css
+++ b/application/palemoon/themes/osx/syncCommon.css
@@ -8,7 +8,7 @@
 }
 
 .statusIcon {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   max-height: 16px;
   max-width: 16px;
 }
diff --git a/application/palemoon/themes/osx/syncSetup.css b/application/palemoon/themes/osx/syncSetup.css
index fff65e9632..8898951ebd 100644
--- a/application/palemoon/themes/osx/syncSetup.css
+++ b/application/palemoon/themes/osx/syncSetup.css
@@ -99,7 +99,7 @@ description > .text-link:focus {
 }
 
 .inputColumn {
-  -moz-margin-end: 2px
+  margin-inline-end: 2px
 }
 
 .pin {
diff --git a/application/palemoon/themes/shared/plugin-doorhanger.inc.css b/application/palemoon/themes/shared/plugin-doorhanger.inc.css
index bda08e4f61..798be2c1de 100644
--- a/application/palemoon/themes/shared/plugin-doorhanger.inc.css
+++ b/application/palemoon/themes/shared/plugin-doorhanger.inc.css
@@ -16,7 +16,7 @@
 }
 
 .center-item-label {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   margin-bottom: 0;
   text-overflow: ellipsis;
 }
@@ -26,7 +26,7 @@
   background-repeat: no-repeat;
   width: 16px;
   height: 15px;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .click-to-play-plugins-notification-button-container {
diff --git a/application/palemoon/themes/windows/aboutCertError.css b/application/palemoon/themes/windows/aboutCertError.css
index dbb3530253..100bb3d3bb 100644
--- a/application/palemoon/themes/windows/aboutCertError.css
+++ b/application/palemoon/themes/windows/aboutCertError.css
@@ -33,7 +33,7 @@ h2 {
   border-radius: 10px;
   box-shadow: 0px 0px 8px red;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   background: url("chrome://global/skin/icons/sslWarning.png") left 0 no-repeat -moz-Field;
   background-origin: content-box;
 }
@@ -43,16 +43,16 @@ h2 {
 }
 
 #errorTitle {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 #errorLongContent {
-  -moz-margin-start: 80px;
+  margin-inline-start: 80px;
 }
 
 .expander > button {
-  -moz-padding-start: 20px;
-  -moz-margin-start: -20px;
+  padding-inline-start: 20px;
+  margin-inline-start: -20px;
   background: url("chrome://browser/skin/aboutCertError_sectionExpanded.png") left center no-repeat;
   border: none;
   font: inherit;
diff --git a/application/palemoon/themes/windows/aboutPrivateBrowsing.css b/application/palemoon/themes/windows/aboutPrivateBrowsing.css
index cd6026b8ea..35843adce6 100644
--- a/application/palemoon/themes/windows/aboutPrivateBrowsing.css
+++ b/application/palemoon/themes/windows/aboutPrivateBrowsing.css
@@ -21,7 +21,7 @@ body.normal > #errorPageContainer {
 }
 
 #startPrivateBrowsingDesc > button {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #footerDesc > p {
@@ -30,7 +30,7 @@ body.normal > #errorPageContainer {
 
 #moreInfo {
   font-size: 110%; /* to match the value set in chrome://global/skin/netError.css */
-  -moz-padding-start: 25px;
+  padding-inline-start: 25px;
   background: url("chrome://global/skin/icons/information-16.png") no-repeat top left;
 }
 
diff --git a/application/palemoon/themes/windows/aboutSyncTabs.css b/application/palemoon/themes/windows/aboutSyncTabs.css
index 4f21a9d408..1fcd8304f7 100644
--- a/application/palemoon/themes/windows/aboutSyncTabs.css
+++ b/application/palemoon/themes/windows/aboutSyncTabs.css
@@ -22,18 +22,18 @@
   margin-top: 4px;
   width: 45em;
   height: 32px;
-  -moz-margin-start: 2em;
-  -moz-margin-end: 2em;
+  margin-inline-start: 2em;
+  margin-inline-end: 2em;
 }
 
 #tabsListHeading {
   font-size: 140%;
   font-weight: bold;
-  -moz-margin-start: 40px;
+  margin-inline-start: 40px;
 }
 
 richlistitem {
-  -moz-margin-end: 2em;
+  margin-inline-end: 2em;
 }
 
 richlistitem[selected="true"],
@@ -46,7 +46,7 @@ richlistitem[type="tab"] {
   border: #999999 1px solid !important;
   padding: 2px 5px;
   margin-bottom: 4px;
-  -moz-margin-start: 4em;
+  margin-inline-start: 4em;
   border-radius: 6px;
   background-color: menu;
   width: 44em;
@@ -64,7 +64,7 @@ richlistitem[type="tab"][selected="true"] {
 richlistitem[type="client"] {
   min-height: 2em;
   color: #000000;
-  -moz-margin-start: 2em;
+  margin-inline-start: 2em;
   margin-top: 2px;
   margin-bottom: 3px;
   width: 42em;
@@ -96,6 +96,6 @@ richlistitem.desktop[type="client"] {
 }
 
 .tabIcon {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
   padding-top: 2px;
 }
diff --git a/application/palemoon/themes/windows/autocomplete.css b/application/palemoon/themes/windows/autocomplete.css
index b3cab44c8e..dbdc3f6d4f 100644
--- a/application/palemoon/themes/windows/autocomplete.css
+++ b/application/palemoon/themes/windows/autocomplete.css
@@ -74,7 +74,7 @@ panel[type="private-autocomplete-richlistbox"],
 }
 
 .private-autocomplete-treebody::-moz-tree-cell-text {
-  -moz-padding-start: 8px;
+  padding-inline-start: 8px;
 }
 
 treechildren.private-autocomplete-treebody::-moz-tree-row(selected) {
@@ -163,8 +163,8 @@ treechildren.private-autocomplete-treebody::-moz-tree-cell-text(selected) {
 .ac-type-icon {
   width: 16px; 
   height: 16px;
-  -moz-margin-start: 6px;
-  -moz-margin-end: 4px;
+  margin-inline-start: 6px;
+  margin-inline-end: 4px;
   margin-bottom: -1px;
 }
 
diff --git a/application/palemoon/themes/windows/browser.css b/application/palemoon/themes/windows/browser.css
index 88c3087ae0..0e5d9ef33e 100644
--- a/application/palemoon/themes/windows/browser.css
+++ b/application/palemoon/themes/windows/browser.css
@@ -285,12 +285,12 @@
   height: auto;
   padding: 0;
   margin: 0;
-  -moz-margin-start: .5em;
+  margin-inline-start: .5em;
 }
 
 .splitmenu-menuitem {
-  -moz-margin-end: 1px;
-  -moz-padding-end: 0.5em;
+  margin-inline-end: 1px;
+  padding-inline-end: 0.5em;
 }
 
 .splitmenu-menu {
@@ -310,7 +310,7 @@
 }
 
 #appmenuPrimaryPane {
-  -moz-border-end: 1px solid ThreeDShadow;
+  border-inline-end: 1px solid ThreeDShadow;
 }
 
 @media (-moz-windows-default-theme) {
@@ -322,13 +322,13 @@
   #appmenuPrimaryPane {
     background-color: rgba(255,255,255,0.5);
     padding: 2px;
-    -moz-border-end: none;
+    border-inline-end: none;
   }
   #appmenuSecondaryPane {
     background-color: #f1f5fb;
     box-shadow: 1px 0 2px rgb(204,214,234) inset;
-    -moz-padding-start: 3px;
-    -moz-padding-end: 2px;
+    padding-inline-start: 3px;
+    padding-inline-end: 2px;
     padding-top: 2px;
     padding-bottom: 2px;
     font-family: "Segoe UI Semibold", "Segoe UI", sans-serif;
@@ -446,7 +446,7 @@
     -moz-appearance: none;
     margin-top: 3px;
     margin-bottom: 3px;
-    -moz-margin-start: 30px;
+    margin-inline-start: 30px;
     padding: 0;
     border-top: 1px solid #d6e5f5;
     border-bottom: none;
@@ -454,17 +454,17 @@
 
   @media (min-resolution: 1.25dppx) {
     .appmenu-menuseparator {
-      -moz-margin-start: 25px;
+      margin-inline-start: 25px;
     }
   }
   @media (min-resolution: 1.5dppx) {
     .appmenu-menuseparator {
-      -moz-margin-start: 24px;
+      margin-inline-start: 24px;
     }
   }
   @media (min-resolution: 2dppx) {
     .appmenu-menuseparator {
-      -moz-margin-start: 22px;
+      margin-inline-start: 22px;
     }
   }
 
@@ -628,7 +628,7 @@
 
 @media not all and (-moz-windows-classic) {
   #titlebar-min {
-    -moz-margin-end: 2px;
+    margin-inline-end: 2px;
   }
 }
 
@@ -643,8 +643,8 @@ toolbarbutton.bookmark-item:hover:active:not([disabled="true"]),
 toolbarbutton.bookmark-item[open="true"] {
   padding-top: 3px;
   padding-bottom: 1px;
-  -moz-padding-start: 4px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 4px;
+  padding-inline-end: 2px;
 }
 
 .bookmark-item:not(#bookmarks-menu-button) > .toolbarbutton-icon {
@@ -684,7 +684,7 @@ menuitem.bookmark-item {
 }
 
 .bookmark-item > .menu-iconic-left > .menu-iconic-icon {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 /* ::::: bookmark items ::::: */
@@ -785,7 +785,7 @@ toolbar[brighttext] .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
 
 .toolbarbutton-1 > .toolbarbutton-icon,
 .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 toolbar[mode=full] .toolbarbutton-1:not([type=menu-button]) {
@@ -827,11 +827,11 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-button {
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker {
-  -moz-padding-start: 0;
+  padding-inline-start: 0;
   -moz-box-align: center;
 }
 
@@ -866,15 +866,15 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 
 @navbarLargeIcons@ .toolbarbutton-1[type=menu]:not(#back-button):not(#forward-button):not(#feed-button) > .toolbarbutton-icon,
 @navbarLargeIcons@ .toolbarbutton-1[type=menu] > .toolbarbutton-text /* hack for add-ons that forcefully display the label */ {
-  -moz-padding-end: 17px;
+  padding-inline-end: 17px;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menu-dropmarker {
-  -moz-margin-start: -15px;
+  margin-inline-start: -15px;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-button > .toolbarbutton-icon {
-  -moz-border-end: none;
+  border-inline-end: none;
 }
 
 @navbarLargeIcons@ .toolbarbutton-1 > .toolbarbutton-menubutton-dropmarker > .dropmarker-icon {
@@ -886,7 +886,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
   display: -moz-box;
   width: 1px;
   height: 18px;
-  -moz-margin-end: -1px;
+  margin-inline-end: -1px;
   background-image: linear-gradient(var(--toolbarbutton-border-color) 0, var(--toolbarbutton-border-color) 18px);
   background-clip: padding-box;
   background-position: center;
@@ -942,7 +942,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 }
 
 @navbarLargeIcons@ .toolbarbutton-1:-moz-any(:hover,[open]) > .toolbarbutton-menubutton-dropmarker:not([disabled]) > .dropmarker-icon {
-  -moz-border-start-color: hsla(210,54%,20%,.35);
+  border-inline-start-color: hsla(210,54%,20%,.35);
 }
 
 @navbarLargeIcons@ .toolbarbutton-1[checked]:not(:active):hover > .toolbarbutton-icon {
@@ -1020,7 +1020,7 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
 
 @conditionalForwardWithUrlbar@ > #forward-button > .toolbarbutton-icon {
   clip-path: url(chrome://browser/content/browser.xul#windows-keyhole-forward-clip-path);
-  -moz-margin-start: -6px !important;
+  margin-inline-start: -6px !important;
   border-left-style: none;
   border-radius: 0;
   padding-left: 7px;
@@ -1048,8 +1048,8 @@ toolbar[mode=full] .toolbarbutton-1 > .toolbarbutton-menubutton-button {
   -moz-image-region: rect(18px, 20px, 38px, 0);
   padding-top: 3px;
   padding-bottom: 3px;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 0;
+  padding-inline-start: 5px;
+  padding-inline-end: 0;
   position: relative;
   z-index: 1;
   border-radius: 0 10000px 10000px 0;
@@ -1212,7 +1212,7 @@ toolbar[brighttext] #bookmarks-menu-button.bookmark-item {
 /* ::::: fullscreen window controls ::::: */
 
 #window-controls {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
 }
 
 #minimize-button,
@@ -1267,7 +1267,7 @@ toolbar[brighttext] #bookmarks-menu-button.bookmark-item {
 
 #urlbar {
   width: 7em;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 @media (-moz-windows-default-theme) {
@@ -1286,13 +1286,13 @@ toolbar[brighttext] #bookmarks-menu-button.bookmark-item {
 
 @conditionalForwardWithUrlbar@ + #urlbar-container {
   padding-left: @conditionalForwardWithUrlbarWidth@px;
-  -moz-margin-start: -@conditionalForwardWithUrlbarWidth@px;
+  margin-inline-start: -@conditionalForwardWithUrlbarWidth@px;
   position: relative;
   pointer-events: none;
 }
 
 @conditionalForwardWithUrlbar@ + #urlbar-container > #urlbar {
-  -moz-border-start: none;
+  border-inline-start: none;
   margin-left: 0;
   pointer-events: all;
 }
@@ -1342,7 +1342,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 .urlbar-input-box {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   min-width: 4em;
 }
 
@@ -1370,25 +1370,25 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar-search-splitter {
   min-width: 6px;
-  -moz-margin-start: -3px;
+  margin-inline-start: -3px;
   border: none;
   background: transparent;
 }
 
 #urlbar-search-splitter + #urlbar-container > #urlbar ,
 #urlbar-search-splitter + #search-container > #searchbar > .searchbar-textbox {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 #urlbar-display-box {
-  -moz-border-end: 1px solid #AAA;
-  -moz-margin-end: 3px;
+  border-inline-end: 1px solid #AAA;
+  margin-inline-end: 3px;
 }
 
 #urlbar-display {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
   color: GrayText;
 }
 
@@ -1410,7 +1410,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 #notification-popup-box:not([hidden]) + #identity-box {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   border-radius: 0;
 }
 
@@ -1420,7 +1420,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedIdentity {
   color: hsl(92,100%,20%);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: -moz-linear-gradient(hsla(92,81%,16%,0),
                                          hsla(92,81%,16%,.08) 25%,
                                          hsla(92,81%,16%,.08) 75%,
@@ -1432,7 +1432,7 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 
 #urlbar[pageproxystate="valid"] > #identity-box.verifiedDomain {
   color: rgb(0,79,168);
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   background-image: -moz-linear-gradient(rgba(0,79,168,0),
                                          rgba(0,79,168,.08) 25%,
                                          rgba(0,79,168,.08) 75%,
@@ -1460,8 +1460,8 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
 }
 
 #identity-icon-labels {
-  -moz-padding-start: 2px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 2px;
+  padding-inline-end: 5px;
 }
 
 /* Address bar shading for SSL */
@@ -1540,14 +1540,14 @@ html|*.urlbar-input:-moz-lwtheme::-moz-placeholder,
   height: 16px;
   margin-top: 1px;
   margin-bottom: 1px;
-  -moz-margin-start: 3px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 3px;
+  margin-inline-end: 2px;
   list-style-image: url(chrome://browser/skin/identity-icons-generic.png);
   -moz-image-region: rect(0, 16px, 16px, 0);
 }
 
 @conditionalForwardWithUrlbar@ + #urlbar-container > #urlbar > #identity-box > #page-proxy-favicon {
-  -moz-margin-end: 1px;
+  margin-inline-end: 1px;
 }
 
 /* Since we already have a padlock, always use the generic icon until the favicon loads
@@ -1796,7 +1796,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 }
 
 #sidebar-title {
-  -moz-padding-start: 0px;
+  padding-inline-start: 0px;
 }
 
 /* ::::: throbber ::::: */
@@ -1874,12 +1874,12 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   /* Hide the transparent top border by default */
   margin-top: -1px;
   /* Reduce the gap between the tabs */
-  -moz-margin-start: -1px;
+  margin-inline-start: -1px;
   box-shadow: var(--tab-box-shadow);
 }
 
 .tabbrowser-tab {
-  -moz-padding-end: 3px;
+  padding-inline-end: 3px;
 }
 
 /* Override the default (globally-set) tab width values; increase
@@ -1996,8 +1996,8 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
   width: 16px;
   height: 16px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
-  -moz-margin-start: 2px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 2px;
+  margin-inline-end: 3px;
 }
 
 .tab-throbber {
@@ -2010,8 +2010,8 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 
 .tab-throbber[pinned],
 .tab-icon-image[pinned] {
-  -moz-margin-start: 5px;
-  -moz-margin-end: 5px;
+  margin-inline-start: 5px;
+  margin-inline-end: 5px;
 }
 
 /* tabbrowser-tab focus ring */
@@ -2042,7 +2042,7 @@ richlistitem[type~="action"][actiontype="switchtab"] > .ac-url-box > .ac-action-
 
 /* Tab sound indicator */
 .tab-icon-sound {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   width: 16px;
   height: 16px;
   padding: 0;
@@ -2273,9 +2273,9 @@ toolbar[brighttext] .tabs-closebutton {
 }
 
 .tabs-closebutton > .toolbarbutton-icon {
-  -moz-margin-end: 0px !important;
-  -moz-padding-end: 2px !important;
-  -moz-padding-start: 2px !important;
+  margin-inline-end: 0px !important;
+  padding-inline-end: 2px !important;
+  padding-inline-start: 2px !important;
 }
 
 toolbarbutton.chevron {
@@ -2301,7 +2301,7 @@ toolbar[mode="text"] toolbarbutton.chevron > .toolbarbutton-icon {
 
 #sidebar-throbber[loading="true"] {
   list-style-image: url("chrome://global/skin/icons/loading_16.png");
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 /* Pale Moon: Feed icon */
@@ -2353,7 +2353,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 .menupopup-drop-indicator {
   list-style-image: none;
   height: 2px;
-  -moz-margin-end: -4em;
+  margin-inline-end: -4em;
   background-color: Highlight;
 }
 
@@ -2379,13 +2379,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 /* Popup Body Text */
 .identity-popup-description {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 2px 0 4px;
 }
 
 .identity-popup-label {
   white-space: pre-wrap;
-  -moz-padding-start: 15px;
+  padding-inline-start: 15px;
   margin: 0;
 }
 
@@ -2419,7 +2419,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption ,
 #identity-popup-content-box.verifiedDomain > #identity-popup-encryption {
   margin-top: 10px;
-  -moz-margin-start: -24px;
+  margin-inline-start: -24px;
 }
 
 #identity-popup-content-box.verifiedIdentity > #identity-popup-encryption > vbox > #identity-popup-encryption-icon ,
@@ -2430,13 +2430,13 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 #identity-popup-more-info-button {
   margin-top: 6px;
   margin-bottom: 0;
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 .popup-notification-icon {
   width: 64px;
   height: 64px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .popup-notification-icon[popupid="geolocation"] {
@@ -2470,8 +2470,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 
 .popup-progress-label,
 .popup-progress-meter {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 .popup-progress-cancel {
@@ -2530,7 +2530,7 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   border-width: 0 8px 0 0;
   border-style: solid;
   border-image: url("chrome://browser/skin/urlbar-arrow.png") 0 8 0 0 fill;
-  -moz-margin-end: -8px;
+  margin-inline-end: -8px;
 }
 
 @conditionalForwardWithUrlbar@[forwarddisabled] + #urlbar-container > #urlbar > #notification-popup-box {
@@ -2792,8 +2792,8 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
 }
 
 #allTabs-filter {
-  -moz-margin-start: 24px;
-  -moz-margin-end: 0;
+  margin-inline-start: 24px;
+  margin-inline-end: 0;
 }
 
 #allTabs-tab-close-button > .toolbarbutton-icon {
@@ -2811,10 +2811,10 @@ toolbarbutton.bookmark-item[dragover="true"][open="true"] {
   height: 22px;
   padding-top: 1px;
   padding-bottom: 5px;
-  -moz-padding-start: 1px;
-  -moz-padding-end: 5px;
+  padding-inline-start: 1px;
+  padding-inline-end: 5px;
   margin-top: -2px;
-  -moz-margin-start: -2px;
+  margin-inline-start: -2px;
   border-bottom-right-radius: 4px;
 }
 
@@ -2940,7 +2940,7 @@ toolbar[brighttext] #addonbar-closebutton {
   text-shadow: none;
   background-image: linear-gradient(#B4211B, #8A1915);
   border-radius: 1px;
-  -moz-margin-end: 5px;
+  margin-inline-end: 5px;
 }
 %endif
 
@@ -2961,7 +2961,7 @@ toolbar[brighttext] #addonbar-closebutton {
 }
 
 .toolbarbutton-badge-stack > .toolbarbutton-icon[label]:not([label=""]) {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 @navbarLargeIcons@ *|* > .toolbarbutton-badge[badge]:not([badge=""])::after {
@@ -3018,7 +3018,7 @@ toolbar[brighttext] #addonbar-closebutton {
 
   #appmenu-popup {
     margin-top: -1px;
-    -moz-margin-start: 1px;
+    margin-inline-start: 1px;
   }
 
   .panel-promo-message {
@@ -3090,19 +3090,19 @@ toolbar[brighttext] #addonbar-closebutton {
 
   .sidebar-splitter {
     border: 0;
-    -moz-border-end: 1px solid #A9B7C9;
+    border-inline-end: 1px solid #A9B7C9;
     min-width: 0;
     width: 3px;
     background-color: transparent;
-    -moz-margin-start: -3px;
+    margin-inline-start: -3px;
     position: relative;
   }
 
   #appcontent ~ .sidebar-splitter {
-    -moz-border-start: 1px solid #A9B7C9;
-    -moz-border-end: none;
-    -moz-margin-start: 0;
-    -moz-margin-end: -3px;
+    border-inline-start: 1px solid #A9B7C9;
+    border-inline-end: none;
+    margin-inline-start: 0;
+    margin-inline-end: -3px;
   }
 
   .menu-accel,
@@ -3796,10 +3796,10 @@ toolbar[brighttext] #addonbar-closebutton {
     border: 1px solid transparent;
   }
   .splitmenu-menuitem {
-    -moz-margin-end: 0;
+    margin-inline-end: 0;
   }
   .splitmenu-menu {
-    -moz-margin-start: -1px;
+    margin-inline-start: -1px;
   }
   .splitmenu-menuitem:-moz-locale-dir(ltr),
   .splitmenu-menu:-moz-locale-dir(rtl) {
@@ -3813,11 +3813,11 @@ toolbar[brighttext] #addonbar-closebutton {
   }
 
   .splitmenu-menuitem > .menu-text {
-    -moz-margin-start: 1px !important;
-    -moz-margin-end: 3px !important;
+    margin-inline-start: 1px !important;
+    margin-inline-end: 3px !important;
   }
   .splitmenu-menu > .menu-right {
-    -moz-margin-end: -3px;
+    margin-inline-end: -3px;
   }
 
   .splitmenu-menuitem[iconic],
@@ -3827,11 +3827,11 @@ toolbar[brighttext] #addonbar-closebutton {
   .splitmenu-menuitem[iconic] > .menu-iconic-left {
     margin-top: -3px;
     margin-bottom: -2px;
-    -moz-margin-start: -1px;
+    margin-inline-start: -1px;
   }
   .splitmenu-menuitem[iconic] > .menu-iconic-text {
-    -moz-margin-start: 2px !important;
-    -moz-margin-end: 3px !important;
+    margin-inline-start: 2px !important;
+    margin-inline-end: 3px !important;
   }
   .splitmenu-menu[iconic] > .menu-right {
     margin-top: -1px;
diff --git a/application/palemoon/themes/windows/downloads/allDownloadsViewOverlay.css b/application/palemoon/themes/windows/downloads/allDownloadsViewOverlay.css
index bd3b7899de..3b8e43bc84 100644
--- a/application/palemoon/themes/windows/downloads/allDownloadsViewOverlay.css
+++ b/application/palemoon/themes/windows/downloads/allDownloadsViewOverlay.css
@@ -13,8 +13,8 @@
 }
 
 .downloadTypeIcon {
-  -moz-margin-start: 8px;
-  -moz-margin-end: 8px;
+  margin-inline-start: 8px;
+  margin-inline-end: 8px;
   /* explicitly size the icon, so size doesn't vary on hidpi systems */
   height: 32px;
   width: 32px;
diff --git a/application/palemoon/themes/windows/downloads/downloads.css b/application/palemoon/themes/windows/downloads/downloads.css
index f16989655b..040f890714 100644
--- a/application/palemoon/themes/windows/downloads/downloads.css
+++ b/application/palemoon/themes/windows/downloads/downloads.css
@@ -88,7 +88,7 @@
 #downloadsSummary,
 richlistitem[type="download"] {
   height: 7em;
-  -moz-padding-end: 0;
+  padding-inline-end: 0;
   color: inherit;
 }
 
@@ -143,7 +143,7 @@ richlistitem[type="download"]:first-child {
 }
 
 .downloadTypeIcon {
-  -moz-margin-end: 8px;
+  margin-inline-end: 8px;
   /* Prevent flickering when changing states. */
   height: 32px;
   width: 32px;
@@ -465,7 +465,7 @@ toolbar[brighttext] #downloads-indicator-counter {
   background-image: linear-gradient(#505050, #575757);
   border: 1px solid;
   border-color: hsla(0,0%,0%,.6) hsla(0,0%,0%,.4) hsla(0,0%,0%,.4);
-  -moz-border-start: none;
+  border-inline-start: none;
   border-radius: 0 2px 2px 0;
 }
 
diff --git a/application/palemoon/themes/windows/engineManager.css b/application/palemoon/themes/windows/engineManager.css
index 18817cd4f2..c6d42cce29 100644
--- a/application/palemoon/themes/windows/engineManager.css
+++ b/application/palemoon/themes/windows/engineManager.css
@@ -5,8 +5,8 @@
 %endif
 
 #engineList treechildren::-moz-tree-image(engineName) {
-  -moz-margin-end: 4px;
-  -moz-margin-start: 1px;
+  margin-inline-end: 4px;
+  margin-inline-start: 1px;
   width: 16px;
   height: 16px;
 }
diff --git a/application/palemoon/themes/windows/feeds/subscribe-ui.css b/application/palemoon/themes/windows/feeds/subscribe-ui.css
index 8ca53283bd..f21c037e67 100644
--- a/application/palemoon/themes/windows/feeds/subscribe-ui.css
+++ b/application/palemoon/themes/windows/feeds/subscribe-ui.css
@@ -7,17 +7,17 @@
 }
 
 .handlersMenuPopup > menuitem {
-  -moz-padding-start: 23px;
+  padding-inline-start: 23px;
 }
 
 .handlersMenuPopup > menuitem.menuitem-iconic {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 .handlersMenuPopup > .menuitem-iconic  > .menu-iconic-left {
   display: -moz-box;
   min-width: 16px;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
 }
 
 .chooseApplicationMenuItem {
diff --git a/application/palemoon/themes/windows/feeds/subscribe.css b/application/palemoon/themes/windows/feeds/subscribe.css
index dc9304b8a6..d6247569b1 100644
--- a/application/palemoon/themes/windows/feeds/subscribe.css
+++ b/application/palemoon/themes/windows/feeds/subscribe.css
@@ -10,7 +10,7 @@ html {
 #feedBody {
   border: 1px solid THreeDShadow;
   padding: 3em;
-  -moz-padding-start: 30px;
+  padding-inline-start: 30px;
   margin: 2em auto;
   background: -moz-Field;
 }
@@ -25,9 +25,9 @@ html {
 #feedHeader {  
   margin-top: 4.9em;
   margin-bottom: 1em;
-  -moz-margin-start: 1.4em;
-  -moz-margin-end: 1em;
-  -moz-padding-start: 2.9em;
+  margin-inline-start: 1.4em;
+  margin-inline-end: 1em;
+  padding-inline-start: 2.9em;
   font-size: 110%;
   color: InfoText;
 }
@@ -54,12 +54,12 @@ html {
 
 #feedHeader[firstrun="true"] #feedIntroText {
   padding-top: 0.1em;
-  -moz-padding-start: 0.6em;
+  padding-inline-start: 0.6em;
   display: block;
 }
 
 #feedHeader[firstrun="true"] > #feedSubscribeLine {
-  -moz-padding-start: 1.8em;
+  padding-inline-start: 1.8em;
 }
 
 #feedSubscribeLine {
@@ -99,8 +99,8 @@ h2 {
 
 #feedTitleLink {
   float: right;
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
 }
@@ -110,15 +110,15 @@ a[href] img {
 }
 
 #feedTitleContainer {
-  -moz-margin-start: 0;
-  -moz-margin-end: .6em;
+  margin-inline-start: 0;
+  margin-inline-end: .6em;
   margin-top: 0;
   margin-bottom: 0;
 }
 
 #feedTitleImage {
-  -moz-margin-start: .6em;
-  -moz-margin-end: 0;
+  margin-inline-start: .6em;
+  margin-inline-end: 0;
   margin-top: 0;
   margin-bottom: 0;
   max-width: 300px;
diff --git a/application/palemoon/themes/windows/pageInfo.css b/application/palemoon/themes/windows/pageInfo.css
index ec65cc4084..3bbfc933b0 100644
--- a/application/palemoon/themes/windows/pageInfo.css
+++ b/application/palemoon/themes/windows/pageInfo.css
@@ -6,7 +6,7 @@
 
 /* View buttons */
 #viewGroup {
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
 }
 
 #viewGroup > radio {
@@ -31,7 +31,7 @@
 
 #topBar {
   border-bottom: 2px groove ThreeDFace;
-  -moz-padding-start: 10px;
+  padding-inline-start: 10px;
   background-color: -moz-Field;
   color: -moz-FieldText;
 }
@@ -98,7 +98,7 @@ textbox {
 }
 
 textbox.header {
-  -moz-margin-start: 0;
+  margin-inline-start: 0;
 }
 
 .iframe {
@@ -121,8 +121,8 @@ groupbox.collapsable caption .caption-icon {
   height: 9px;
   background-repeat: no-repeat;
   background-position: center;
-  -moz-margin-start: 2px;
-  -moz-margin-end: 2px;
+  margin-inline-start: 2px;
+  margin-inline-end: 2px;
   background-image: url("chrome://global/skin/tree/twisty.svg#open");
 }
 
@@ -142,7 +142,7 @@ groupbox tree {
 }
 
 #securityBox description { 
-  -moz-margin-start: 10px;
+  margin-inline-start: 10px;
 }
 
 #general-security-identity {
@@ -197,8 +197,8 @@ treechildren::-moz-tree-cell-text(broken) {
 #feedListbox richlistitem {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
 }
@@ -235,8 +235,8 @@ treechildren::-moz-tree-cell-text(broken) {
 .permission {
   padding-top: 6px;
   padding-bottom: 6px;
-  -moz-padding-start: 7px;
-  -moz-padding-end: 7px;
+  padding-inline-start: 7px;
+  padding-inline-end: 7px;
   min-height: 25px;
   border-bottom: 1px dotted #C0C0C0;
 }
diff --git a/application/palemoon/themes/windows/permissions/aboutPermissions.css b/application/palemoon/themes/windows/permissions/aboutPermissions.css
index 60ee816733..d3ceed7567 100644
--- a/application/palemoon/themes/windows/permissions/aboutPermissions.css
+++ b/application/palemoon/themes/windows/permissions/aboutPermissions.css
@@ -43,7 +43,7 @@
 .site-favicon {
   height: 16px;
   width: 16px;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
   list-style-image: url("chrome://mozapps/skin/places/defaultFavicon.png");
 }
 
@@ -60,7 +60,7 @@
 
 #site-description {
   font-size: 125%;
-  -moz-margin-start: 6px; /* to match button margin */
+  margin-inline-start: 6px; /* to match button margin */
 }
 
 #site-label {
@@ -72,7 +72,7 @@
 #defaults-description {
   font-size: 125%;
   font-weight: bold;
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
 }
 
 .pref-item {
@@ -82,7 +82,7 @@
 .pref-icon {
   width: 48px;
   height: 48px;
-  -moz-margin-end: 10px;
+  margin-inline-end: 10px;
 }
 
 .pref-icon[type="password"] {
diff --git a/application/palemoon/themes/windows/places/editBookmarkOverlay.css b/application/palemoon/themes/windows/places/editBookmarkOverlay.css
index be3ea83f4b..3d67cd3f4c 100644
--- a/application/palemoon/themes/windows/places/editBookmarkOverlay.css
+++ b/application/palemoon/themes/windows/places/editBookmarkOverlay.css
@@ -24,7 +24,7 @@
 .expander-down {
   min-width: 0;
   margin: 0;
-  -moz-margin-end: 4px;
+  margin-inline-end: 4px;
 }
 
 .expander-up > .button-box,
diff --git a/application/palemoon/themes/windows/places/organizer.css b/application/palemoon/themes/windows/places/organizer.css
index f7b87d34ef..0a947c2ac0 100644
--- a/application/palemoon/themes/windows/places/organizer.css
+++ b/application/palemoon/themes/windows/places/organizer.css
@@ -20,7 +20,7 @@
 /* Toolbar */
 #placesToolbar {
   padding: 3px;
-  -moz-padding-end: 6px;
+  padding-inline-end: 6px;
 }
 
 #placesToolbar > toolbarbutton[disabled] > .toolbarbutton-icon {
@@ -47,14 +47,14 @@
 
 /* Menu */
 #placesMenu {
-  -moz-margin-start: 6px;
+  margin-inline-start: 6px;
   -moz-appearance: none;
   border: none;
 }
 
 #placesMenu > menu {
-  -moz-padding-start: 4px;
-  -moz-padding-end: 1px;
+  padding-inline-start: 4px;
+  padding-inline-end: 1px;
   padding-top: 2px;
   padding-bottom: 2px;
   -moz-appearance: toolbarbutton;
@@ -75,14 +75,14 @@
 
 #placesMenu > menu[open="true"] {
   border-color: ThreeDShadow ThreeDHighlight ThreeDHighlight ThreeDShadow;
-  -moz-padding-start: 5px;
-  -moz-padding-end: 0px;
+  padding-inline-start: 5px;
+  padding-inline-end: 0px;
   padding-top: 3px;
   padding-bottom: 1px;
 }
 
 #placesMenu > menu > .menubar-text {
-  -moz-padding-end: 8px;
+  padding-inline-end: 8px;
   background: url(chrome://global/skin/arrow/arrow-dn.gif) right center no-repeat;
 }
 
@@ -124,12 +124,12 @@
 }
 
 #infoBoxExpanderLabel {
-  -moz-padding-start: 2px;
+  padding-inline-start: 2px;
 }
 
 #organizerScopeBar {
   padding: 2px 0;
-  -moz-padding-end: 3px;
+  padding-inline-end: 3px;
 }
 
 #organizerScopeBar > toolbarbutton {
@@ -171,8 +171,8 @@
 }
 
 #clearDownloadsButton {
-  -moz-padding-start: 9px;
-  -moz-padding-end: 9px;
+  padding-inline-start: 9px;
+  padding-inline-end: 9px;
 }
 
 #placesView {
@@ -195,11 +195,11 @@
 @media (-moz-windows-default-theme) {
   #placesView > splitter {
     border: 0;
-    -moz-border-end: 1px solid #A9B7C9;
+    border-inline-end: 1px solid #A9B7C9;
     min-width: 0;
     width: 3px;
     background-color: transparent;
-    -moz-margin-start: -3px;
+    margin-inline-start: -3px;
     position: relative;
   }
 }
@@ -235,7 +235,7 @@
   #searchFilter {
     -moz-appearance: none;
     padding: 2px;
-    -moz-padding-start: 4px;
+    padding-inline-start: 4px;
     background-clip: padding-box;
     border: 1px solid rgba(0,0,0,.32);
     border-radius: 2px;
diff --git a/application/palemoon/themes/windows/places/places.css b/application/palemoon/themes/windows/places/places.css
index bb160463e0..a16b82113d 100644
--- a/application/palemoon/themes/windows/places/places.css
+++ b/application/palemoon/themes/windows/places/places.css
@@ -168,5 +168,5 @@ treechildren::-moz-tree-cell-text(cutting) {
 #viewButton > .button-box > .button-menu-dropmarker {
   height: auto;
   width: auto;
-  -moz-margin-end: -3px;
+  margin-inline-end: -3px;
 }
diff --git a/application/palemoon/themes/windows/preferences/applications.css b/application/palemoon/themes/windows/preferences/applications.css
index 80699b4635..fdf5614772 100644
--- a/application/palemoon/themes/windows/preferences/applications.css
+++ b/application/palemoon/themes/windows/preferences/applications.css
@@ -11,18 +11,18 @@
 .actionsMenu {
   margin-top: 0;
   margin-bottom: 0;
-  -moz-margin-start: -2px;
-  -moz-margin-end: 0;
+  margin-inline-start: -2px;
+  margin-inline-end: 0;
 }
 
 .typeIcon,
 .actionIcon {
-  -moz-margin-start: 3px;
-  -moz-margin-end: 3px;
+  margin-inline-start: 3px;
+  margin-inline-end: 3px;
 }
 
 richlistitem label {
-  -moz-margin-start: 1px;
+  margin-inline-start: 1px;
   margin-top: 2px;
 }
 
@@ -51,14 +51,14 @@ menuitem[appHandlerIcon="plugin"] {
 }
 
 .actionsMenu .menulist-icon {
-  -moz-margin-end: 3px;
+  margin-inline-end: 3px;
 }
 
 .actionsMenu > menupopup > menuitem > .menu-iconic-left {
-  -moz-padding-start: 0px;
-  -moz-padding-end: 2px;
+  padding-inline-start: 0px;
+  padding-inline-end: 2px;
 }
 
 .actionsMenu > menupopup > menuitem {
-  -moz-padding-start: 4px;
+  padding-inline-start: 4px;
 }
diff --git a/application/palemoon/themes/windows/sanitizeDialog.css b/application/palemoon/themes/windows/sanitizeDialog.css
index 4312eb8fb7..58e1f2983f 100644
--- a/application/palemoon/themes/windows/sanitizeDialog.css
+++ b/application/palemoon/themes/windows/sanitizeDialog.css
@@ -3,12 +3,12 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #sanitizeDurationChoice {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 
 /* Align the duration label with the warning box and item list */
 #sanitizeDurationLabel {
-  -moz-margin-start: 3px;
+  margin-inline-start: 3px;
 }
 
 
@@ -79,15 +79,15 @@
 
 /* Make the item list the same width as the warning box */
 #itemList {
-  -moz-margin-start: 0;
-  -moz-margin-end: 0;
+  margin-inline-start: 0;
+  margin-inline-end: 0;
 }
 
 
 /* Align the last dialog button with the end of the warning box */
 .prefWindow-dlgbuttons {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
 .dialog-button[dlgtype="cancel"] {
-  -moz-margin-end: 0;
+  margin-inline-end: 0;
 }
diff --git a/application/palemoon/themes/windows/searchbar.css b/application/palemoon/themes/windows/searchbar.css
index 86a485530c..d660772b91 100644
--- a/application/palemoon/themes/windows/searchbar.css
+++ b/application/palemoon/themes/windows/searchbar.css
@@ -22,7 +22,7 @@
   width: 16px;
   list-style-image: url("chrome://global/skin/icons/folder-item.png");
   -moz-image-region: rect(0px, 16px, 16px, 0px);
-  -moz-margin-start: 2px;
+  margin-inline-start: 2px;
 }
 
 .searchbar-engine-button {
@@ -30,7 +30,7 @@
   min-width: 0;
   margin: 0;
   padding: 0;
-  -moz-padding-end: 2px;
+  padding-inline-end: 2px;
   -moz-box-align: center;
   background: none;
   border: none;
diff --git a/application/palemoon/themes/windows/statusbar/overlay.css b/application/palemoon/themes/windows/statusbar/overlay.css
index 7f9a5982fe..d9a36789ba 100644
--- a/application/palemoon/themes/windows/statusbar/overlay.css
+++ b/application/palemoon/themes/windows/statusbar/overlay.css
@@ -58,7 +58,7 @@ toolbar[brighttext] #status4evar-download-button #status4evar-download-icon
 
 toolbar[mode="icons"] #status4evar-download-button[forcelabel="true"] > label
 {
-	-moz-margin-start: 5px !important;
+	margin-inline-start: 5px !important;
 }
 
 /*
@@ -77,7 +77,7 @@ splitter.status4evar-status-splitter
 
 #urlbar-progress-alt
 {
-	-moz-margin-end: -2px;
+	margin-inline-end: -2px;
 }
 
 /*
diff --git a/application/palemoon/themes/windows/syncCommon.css b/application/palemoon/themes/windows/syncCommon.css
index f0beae0d53..838788cd52 100644
--- a/application/palemoon/themes/windows/syncCommon.css
+++ b/application/palemoon/themes/windows/syncCommon.css
@@ -8,7 +8,7 @@
 }
 
 .statusIcon {
-  -moz-margin-start: 4px;
+  margin-inline-start: 4px;
   max-height: 16px;
   max-width: 16px;
 }
diff --git a/application/palemoon/themes/windows/syncSetup.css b/application/palemoon/themes/windows/syncSetup.css
index fff65e9632..8898951ebd 100644
--- a/application/palemoon/themes/windows/syncSetup.css
+++ b/application/palemoon/themes/windows/syncSetup.css
@@ -99,7 +99,7 @@ description > .text-link:focus {
 }
 
 .inputColumn {
-  -moz-margin-end: 2px
+  margin-inline-end: 2px
 }
 
 .pin {