1 files changed, 18 insertions, 18 deletions
diff --git a/application/basilisk/components/nsBrowserGlue.js b/application/basilisk/components/nsBrowserGlue.js
index 3258159b6..d77e97f87 100644
--- a/application/basilisk/components/nsBrowserGlue.js
+++ b/application/basilisk/components/nsBrowserGlue.js
@@ -1080,24 +1080,19 @@ BrowserGlue.prototype = {
 
     // For any add-ons that were installed disabled and can be enabled offer
     // them to the user.
-    let win = RecentWindow.getMostRecentBrowserWindow();
-    AddonManager.getAllAddons(addons => {
-      for (let addon of addons) {
-        // If this add-on has already seen (or seen is undefined for non-XPI
-        // add-ons) then skip it.
-        if (addon.seen !== false) {
-          continue;
-        }
-
-        // If this add-on cannot be enabled (either already enabled or
-        // appDisabled) then skip it.
-        if (!(addon.permissions & AddonManager.PERM_CAN_ENABLE)) {
-          continue;
-        }
-
-        win.openUILinkIn("about:newaddon?id=" + addon.id, "tab");
-      }
-    });
+    let changedIDs = AddonManager.getStartupChanges(AddonManager.STARTUP_CHANGE_INSTALLED);
+    if (changedIDs.length > 0) {
+      let win = this.getMostRecentBrowserWindow();
+      AddonManager.getAddonsByIDs(changedIDs, function(aAddons) {
+        aAddons.forEach(function(aAddon) {
+          // If the add-on isn't user disabled or can't be enabled then skip it.
+          if (!aAddon.userDisabled || !(aAddon.permissions & AddonManager.PERM_CAN_ENABLE))
+            return;
+
+          win.openUILinkIn("about:newaddon?id=" + aAddon.id, "tab");
+        })
+      });
+    }
 
     let signingRequired;
     if (AppConstants.MOZ_REQUIRE_SIGNING) {
@@ -1110,6 +1105,11 @@ BrowserGlue.prototype = {
       let disabledAddons = AddonManager.getStartupChanges(AddonManager.STARTUP_CHANGE_DISABLED);
       AddonManager.getAddonsByIDs(disabledAddons, (addons) => {
         for (let addon of addons) {
+          // WEs return null, skip.
+          if (!addon) {
+            continue;
+          }
+          
           if (addon.type == "experiment")
             continue;