Bug 618760 - Multiple add-on entries in list view when downloading an update. r=dtownsend, a=blocking-final

toolkit/mozapps/extensions/content/extensions.js

@@ -2129,6 +2129,9 @@ var gListView = {
     if (aObj.type != this._type)
       return;
 
+    if (aIsInstall && aObj.existingAddon)
+      return;
+
     let prop = aIsInstall ? "mInstall" : "mAddon";
     for (let i = 0; i < this._listBox.itemCount; i++) {
       let item = this._listBox.childNodes[i];

toolkit/mozapps/extensions/test/browser/browser_install.js

@@ -62,6 +62,9 @@ function installUpgrade(aCallback) {
         is(get_list_item_count(), 1, "Should be only one item in the list");
 
         aInstall.addListener({
+          onDownloadEnded: function() {
+            is(get_list_item_count(), 1, "Should be only one item in the list once the update has started");
+          },
           onInstallEnded: function() {
             executeSoon(aCallback);
           }