function test() { waitForExplicitFinish(); var pageInfo; gBrowser.selectedTab = gBrowser.addTab(); gBrowser.selectedBrowser.addEventListener("load", function loadListener() { gBrowser.selectedBrowser.removeEventListener("load", loadListener, true); Services.obs.addObserver(observer, "page-info-dialog-loaded", false); pageInfo = BrowserPageInfo(); }, true); content.location = "https://example.com/browser/browser/base/content/test/feed_tab.html"; function observer(win, topic, data) { Services.obs.removeObserver(observer, "page-info-dialog-loaded"); handlePageInfo(); } function handlePageInfo() { ok(pageInfo.document.getElementById("feedTab"), "Feed tab"); let feedListbox = pageInfo.document.getElementById("feedListbox"); ok(feedListbox, "Feed list"); var feedRowsNum = feedListbox.getRowCount(); is(feedRowsNum, 3, "Number of feeds listed"); for (var i = 0; i < feedRowsNum; i++) { let feedItem = feedListbox.getItemAtIndex(i); is(feedItem.getAttribute("name"), i + 1, "Feed name"); } pageInfo.close(); gBrowser.removeCurrentTab(); finish(); } }