Submitted By:            Douglas R. Reno <renodr at linuxfromscratch dot org>
Date:                    2020-09-12
Initial Package Version: 78.2.2
Upstream Status:         Applied
Origin:                  Upstream
Descrpition:             Fixes a regression causing Thunderbird to fail to
                         initialize properly. The symptoms include menu bar
                         items that don't open, or that malfuction, as well as
                         being unable to see folders, mail, or mail contents.

diff -Naurp thunderbird-78.2.2.orig/comm/mail/base/content/specialTabs.js thunderbird-78.2.2/comm/mail/base/content/specialTabs.js
--- thunderbird-78.2.2.orig/comm/mail/base/content/specialTabs.js       2020-09-08 18:21:50.000000000 -0500
+++ thunderbird-78.2.2/comm/mail/base/content/specialTabs.js    2020-09-12 16:44:45.333743302 -0500
@@ -1048,18 +1048,20 @@ var specialTabs = {
       Services.prefs.setCharPref("mailnews.start_page_override.mstone", mstone);
     }
 
-    let update = Cc["@mozilla.org/updates/update-manager;1"].getService(
-      Ci.nsIUpdateManager
-    ).activeUpdate;
+    if (AppConstants.MOZ_UPDATER) {
+       let update = Cc["@mozilla.org/updates/update-manager;1"].getService(
+          Ci.nsIUpdateManager
+       ).activeUpdate;
 
     if (update && Services.vc.compare(update.appVersion, old_mstone) > 0) {
-      let overridePage = Services.urlFormatter.formatURLPref(
-        "mailnews.start_page.override_url"
-      );
-      overridePage = this.getPostUpdateOverridePage(update, overridePage);
-      overridePage = overridePage.replace("%OLD_VERSION%", old_mstone);
-      if (overridePage) {
-        openLinkExternally(overridePage);
+       let overridePage = Services.urlFormatter.formatURLPref(
+          "mailnews.start_page.override_url"
+       );
+       overridePage = this.getPostUpdateOverridePage(update, overridePage);
+       overridePage = overridePage.replace("%OLD_VERSION%", old_mstone);
+       if (overridePage) {
+          openLinkExternally(overridePage);
+       }
       }
     }
   },