--- a/toolkit/mozapps/extensions/content/extensions.js
+++ b/toolkit/mozapps/extensions/content/extensions.js
@@ -2961,18 +2961,18 @@ var gListView = {
   },
 
   onInstallCancelled(aInstall) {
     this.removeItem(aInstall, true);
   },
 
   onInstallEnded(aInstall) {
     // Remove any install entries for upgrades, their status will appear against
-    // the existing item
-    if (aInstall.existingAddon)
+    // the existing item. Also remove install entries for hidden add-ons.
+    if (aInstall.existingAddon || aInstall.addon.hidden)
       this.removeItem(aInstall, true);
 
     if (aInstall.addon.type == "experiment") {
       let item = this.getListItemForID(aInstall.addon.id);
       if (item) {
         item.endDate = getExperimentEndDate(aInstall.addon);
       }
     }