Fix browser_save_video.js

browser/base/content/test/Makefile.in

@@ -212,6 +212,7 @@ _BROWSER_FILES = \
                  browser_clearplugindata_noage.html \
                  browser_popupUI.js \
                  browser_sanitizeDialog.js \
+                 browser_save_video.js \
                  bug564387.html \
                  bug564387_video1.ogv \
                  bug564387_video1.ogv^headers^ \

browser/base/content/test/browser_save_video.js

@@ -20,12 +20,14 @@ function test() {
       return;
     gBrowser.removeEventListener("pageshow", pageShown);
 
-    document.addEventListener("popupshown", contextMenuOpened);
+    executeSoon(function () {
+      document.addEventListener("popupshown", contextMenuOpened);
 
-    var video1 = gBrowser.contentDocument.getElementById("video1");
+      var video1 = gBrowser.contentDocument.getElementById("video1");
-    EventUtils.synthesizeMouseAtCenter(video1,
+      EventUtils.synthesizeMouseAtCenter(video1,
-                                       { type: "contextmenu", button: 2 },
+                                         { type: "contextmenu", button: 2 },
-                                       gBrowser.contentWindow);
+                                         gBrowser.contentWindow);
+    });
   });
 
   function contextMenuOpened(event) {