diff --git a/application/basilisk/components/preferences/in-content/main.xul b/application/basilisk/components/preferences/in-content/main.xul
index f695b308bd..9180f1c520 100644
--- a/application/basilisk/components/preferences/in-content/main.xul
+++ b/application/basilisk/components/preferences/in-content/main.xul
@@ -96,6 +96,12 @@
     <preference id="browser.ctrlTab.previews"
                 name="browser.ctrlTab.previews"
                 type="bool"/>
+
+    <!-- Theme -->
+    <preference id="widget.native-controls.override-win-version"
+                name="widget.native-controls.override-win-version"
+                type="int"/>
+
 </preferences>
 
 <hbox id="header-general"
@@ -271,3 +277,48 @@
               preference="browser.taskbar.previews.enable"/>
 #endif
 </groupbox>
+
+<!-- Theme -->
+<groupbox id="themeGroup"
+          data-category="paneGeneral"
+          hidden="true">
+  <caption><label>&theme.label;</label></caption>
+
+  <html:table id="themeTable">
+    <html:tr>
+      <html:td class="label-cell">
+        <label accesskey="&ThemeOverride.accesskey;"
+               control="browserThemeOverride">&ThemeOverride.label;</label>
+      </html:td>
+      <html:td class="content-cell">
+        <menulist id="browserThemeOverride"
+                  class="content-cell-item"
+                  preference="widget.native-controls.override-win-version">
+          <menupopup>
+          <menuitem label="&browserThemeOverrideNone.label;"
+                    value="0"
+                    id="browserThemeOverrideNone"/>
+          <menuitem label="&browserThemeOverrideXP.label;"
+                    value="5"
+                    id="browserThemeOverrideXP"/>
+          <menuitem label="&browserThemeOverrideVista.label;"
+                    value="6"
+                    id="browserThemeOverrideVista"/>
+          <menuitem label="&browserThemeOverride7.label;"
+                    value="7"
+                    id="browserThemeOverride7"/>
+          <menuitem label="&browserThemeOverride8.label;"
+                    value="8"
+                    id="browserThemeOverride8"/>
+          <menuitem label="&browserThemeOverride10.label;"
+                    value="10"
+                    id="browserThemeOverride10"/>
+          <menuitem label="&browserThemeOverride11.label;"
+                    value="11"
+                    id="browserThemeOverride11"/>
+          </menupopup>
+        </menulist>
+      </html:td>
+    </html:tr>
+  </html:table>
+</groupbox>
diff --git a/application/basilisk/locales/en-US/chrome/browser/preferences/main.dtd b/application/basilisk/locales/en-US/chrome/browser/preferences/main.dtd
index 6b56f34005..eb435f6d76 100644
--- a/application/basilisk/locales/en-US/chrome/browser/preferences/main.dtd
+++ b/application/basilisk/locales/en-US/chrome/browser/preferences/main.dtd
@@ -43,3 +43,15 @@
 <!ENTITY getStarted.label                 "Start using Sync…">
 
 <!ENTITY e10sEnabled.label                "Enable multi-process &brandShortName;">
+
+<!ENTITY theme.label                      "Theme Override">
+
+<!ENTITY ThemeOverride.label              "Override Windows version theme (requires restart):">
+<!ENTITY ThemeOverride.accesskey          "t">
+<!ENTITY browserThemeOverrideNone.label   "Current OS version">
+<!ENTITY browserThemeOverrideXP.label     "Windows XP">
+<!ENTITY browserThemeOverrideVista.label  "Windows Vista">
+<!ENTITY browserThemeOverride7.label      "Windows 7">
+<!ENTITY browserThemeOverride8.label      "Windows 8">
+<!ENTITY browserThemeOverride10.label     "Windows 10">
+<!ENTITY browserThemeOverride11.label     "Windows 11">
diff --git a/application/palemoon/components/preferences/main.xul b/application/palemoon/components/preferences/main.xul
index 16b784cdd7..3484a3ae8d 100644
--- a/application/palemoon/components/preferences/main.xul
+++ b/application/palemoon/components/preferences/main.xul
@@ -69,6 +69,11 @@
       <preference id="browser.download.saveZoneInformation" name="browser.download.saveZoneInformation" type="int" />
 #endif
 
+      <!-- Theme -->
+      <preference id="widget.native-controls.override-win-version"
+                  name="widget.native-controls.override-win-version"
+                  type="int"/>
+
     </preferences>
     
     <stringbundle id="bundlePreferences" src="chrome://browser/locale/preferences/preferences.properties"/>
@@ -177,6 +182,27 @@
 #endif
     </groupbox>
 
+    <!-- Theme -->
+    <groupbox id="themeGroup">
+      <caption label="&theme.label;"/>
+
+      <hbox align="center">
+        <label value="&ThemeOverride.label;" accesskey="&ThemeOverride.accesskey;"
+               control="browserThemeOverride"/>
+        <menulist id="browserThemeOverride" preference="widget.native-controls.override-win-version">
+          <menupopup>
+            <menuitem label="&browserThemeOverrideNone.label;" value="0" id="browserThemeOverrideNone"/>
+            <menuitem label="&browserThemeOverrideXP.label;" value="5" id="browserThemeOverrideXP"/>
+            <menuitem label="&browserThemeOverrideVista.label;" value="6" id="browserThemeOverrideVista"/>
+            <menuitem label="&browserThemeOverride7.label;" value="7" id="browserThemeOverride7"/>
+            <menuitem label="&browserThemeOverride8.label;" value="8" id="browserThemeOverride8"/>
+            <menuitem label="&browserThemeOverride10.label;" value="10" id="browserThemeOverride10"/>
+            <menuitem label="&browserThemeOverride11.label;" value="11" id="browserThemeOverride11"/>
+          </menupopup>
+        </menulist>
+      </hbox>
+    </groupbox>
+
   </prefpane>
 
 </overlay>
diff --git a/application/palemoon/locales/en-US/chrome/browser/preferences/main.dtd b/application/palemoon/locales/en-US/chrome/browser/preferences/main.dtd
index 15468eeb71..ed73df206a 100644
--- a/application/palemoon/locales/en-US/chrome/browser/preferences/main.dtd
+++ b/application/palemoon/locales/en-US/chrome/browser/preferences/main.dtd
@@ -42,3 +42,15 @@
 <!ENTITY zoneInfo.always      "Always">
 <!ENTITY zoneInfo.system      "Use system setting">
 
+<!ENTITY theme.label                      "Theme Override">
+
+<!ENTITY ThemeOverride.label              "Override Windows version theme (requires restart):">
+<!ENTITY ThemeOverride.accesskey          "t">
+<!ENTITY browserThemeOverrideNone.label   "Current OS version">
+<!ENTITY browserThemeOverrideXP.label     "Windows XP">
+<!ENTITY browserThemeOverrideVista.label  "Windows Vista">
+<!ENTITY browserThemeOverride7.label      "Windows 7">
+<!ENTITY browserThemeOverride8.label      "Windows 8">
+<!ENTITY browserThemeOverride10.label     "Windows 10">
+<!ENTITY browserThemeOverride11.label     "Windows 11">
+
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 9f73b219fd..cd7b37dffb 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -3659,6 +3659,18 @@ pref("ui.osk.debug.keyboardDisplayReason", "");
 //  * 2: auto
 pref("widget.windows.follow_shortcuts_on_file_open", 1);
 
+// Whether to override the Windows version for styling purposes
+//
+// Valid values:
+//  * 0: never
+//  * 5: XP
+//  * 6: Vista
+//  * 7: 7
+//  * 8: 8
+//  * 10: 10
+//  * 11: 11
+pref("widget.native-controls.override-win-version", 0);
+
 # XP_WIN
 #endif
 
diff --git a/widget/windows/nsLookAndFeel.cpp b/widget/windows/nsLookAndFeel.cpp
index f03b7a7383..c5bbbdb7df 100644
--- a/widget/windows/nsLookAndFeel.cpp
+++ b/widget/windows/nsLookAndFeel.cpp
@@ -11,6 +11,7 @@
 #include "nsUXThemeConstants.h"
 #include "gfxFont.h"
 #include "WinUtils.h"
+#include "mozilla/Preferences.h"
 #include "mozilla/WindowsVersion.h"
 #include "gfxFontConstants.h"
 
@@ -27,15 +28,18 @@ nsLookAndFeel::GetOperatingSystemVersion()
     return version;
   }
 
-  if (IsWin11OrLater()) {
+  int overridePref = Preferences::GetInt("widget.native-controls.override-win-version", 1);
+  bool doesOverride = overridePref > 0;
+
+  if ((!doesOverride && IsWin11OrLater()) || overridePref == 11) {
     version = eOperatingSystemVersion_Windows11;
-  } else if (IsWin10OrLater()) {
+  } else if ((!doesOverride && IsWin10OrLater()) || overridePref == 10) {
     version = eOperatingSystemVersion_Windows10;
-  } else if (IsWin8OrLater()) {
+  } else if ((!doesOverride && IsWin8OrLater()) || overridePref == 8) {
     version = eOperatingSystemVersion_Windows8;
-  } else if (IsWin7OrLater()) {
+  } else if ((!doesOverride && IsWin7OrLater()) || overridePref == 7) {
     version = eOperatingSystemVersion_Windows7;
-  } else if (IsVistaOrLater()) {
+  } else if ((!doesOverride && IsVistaOrLater()) || overridePref == 6) {
     version = eOperatingSystemVersion_WindowsVista;
   } else {
     version = eOperatingSystemVersion_WindowsXP;