https://tbpl.mozilla.org/php/getParsedLog.php?id=9384818&tree=Firefox&full=1 Rev3 Fedora 12x64 mozilla-central debug test mochitest-other on 2012-02-16 04:30:20 PST for push 6989376471f7 FF 13 is not affected, whereas SM 2.10 is. (Test codes have differences, but they should hopefully be irrelevant here.) http://tinderbox.mozilla.org/showlog.cgi?log=SeaMonkey/1329382375.1329388034.29824.gz&fulltext=1 OS X 10.6 comm-central-trunk debug test mochitest-other on 2012/02/16 00:52:55 { TEST-PASS | chrome://mochitests/content/browser/suite/browser/test/browser_pluginnotification.js | Should have opened the correct tab TEST-PASS | chrome://mochitests/content/browser/suite/browser/test/browser_pluginnotification.js | Should have displayed the plugins pane TEST-INFO | chrome://mochitests/content/browser/suite/browser/test/browser_pluginnotification.js | Console message: [JavaScript Warning: "WARN addons.manager: Exception calling callback: TypeError: createItem is not a function" {file: "chrome://mozapps/content/extensions/extensions.js" line: 2389}] Document chrome://mochitests/content/browser/suite/browser/test/plugin_test.html loaded successfully TEST-PASS | chrome://mochitests/content/browser/suite/browser/test/browser_pluginnotification.js | Test 5, Should not have displayed the missing plugin notification } Already noticed on WINNT 5.2 in bug 725058 comment 1. *** I can reproduce with an Opt build on my Windows 2000. It happens while "plugin_test.html" is loading, after prepareTest5() and before test5(): { 152 function prepareTest5() { 153 var plugin = get_test_plugin(); 154 plugin.disabled = false; 155 plugin.blocklisted = true; 156 prepareTest(test5, gTestRoot + "plugin_test.html"); 157 } 158 159 // Tests a page with a blocked plugin in it. 160 function test5() { 161 var notificationBox = gBrowser.getNotificationBox(gTestBrowser); } Code is http://mxr.mozilla.org/mozilla-central/source/toolkit/mozapps/extensions/content/extensions.js { 2370 show: function(aType, aRequest) { ... 2382 getAddonsAndInstalls(aType, function(aAddonsList, aInstallsList) { ... 2388 for (let i = 0; i < aAddonsList.length; i++) 2389 elements.push(createItem(aAddonsList[i])); }