var gTestRoot = getRootDirectory(gTestPath).replace( "chrome://mochitests/content/", "http://127.0.0.1:8888/" ); var gTestBrowser = null; var gConsoleErrors = 0; add_task(async function () { registerCleanupFunction(function () { Services.console.unregisterListener(errorListener); gBrowser.removeCurrentTab(); window.focus(); gTestBrowser = null; }); gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser); gTestBrowser = gBrowser.selectedBrowser; let errorListener = { observe(aMessage) { if (aMessage.message.includes("NS_ERROR_FAILURE")) { gConsoleErrors++; } }, }; Services.console.registerListener(errorListener); await promiseTabLoadEvent( gBrowser.selectedTab, gTestRoot + "plugin_bug797677.html" ); let pluginInfo = await promiseForPluginInfo("plugin"); is( pluginInfo.displayedType, Ci.nsIObjectLoadingContent.TYPE_FALLBACK, "plugin should not have been found." ); await SpecialPowers.spawn(gTestBrowser, [], function () { let plugin = content.document.getElementById("plugin"); ok(plugin, "plugin should be in the page"); }); is(gConsoleErrors, 0, "should have no console errors"); });