import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

toolkit/mozapps/update/content/updates.css

@@ -0,0 +1,33 @@
+/* Stop animations on pages that aren't on the current page (bug 341749). */
+#updates:not([currentpageid="checking"]) #checkingProgress,
+#updates:not([currentpageid="downloading"]) #downloadProgress {
+  display: none;
+}
+
+/* Hide the wizard's header so the size of the billboard can size the window 
+   on creation. A custom header will be used in its place when a header is
+   needed. */
+.wizard-header {
+  display: none;
+}
+
+/* Display the custom header */
+.update-header {
+  display: -moz-box !important;
+}
+
+/* Custom header implementation based on the Wizard's header. This allows the
+   size of the billboard's remotecontent to size the window since it does not
+   have an updateheader on the billboard page. */
+updateheader {
+  -moz-binding: url("chrome://mozapps/content/update/updates.xml#updateheader");
+  display: -moz-box;
+  -moz-box-orient: horizontal;
+}
+
+/* Update History Window */
+update {
+  -moz-binding: url("chrome://mozapps/content/update/updates.xml#update");
+  display: -moz-box;
+  -moz-box-orient: vertical;
+}