function remote(task) { return SpecialPowers.spawn(gBrowser.selectedBrowser, [], task); } add_task(async function () { gBrowser.selectedTab = BrowserTestUtils.addTab(gBrowser); let promise = BrowserTestUtils.waitForErrorPage(gBrowser.selectedBrowser); BrowserTestUtils.startLoadingURIString( gBrowser, "https://nocert.example.com/" ); await promise; await remote(() => { // Confirm that we are displaying the contributed error page, not the default let uri = content.document.documentURI; Assert.ok( uri.startsWith("about:certerror"), "Broken page should go to about:certerror, not about:neterror" ); }); await remote(() => { let div = content.document.getElementById("badCertAdvancedPanel"); // Confirm that the expert section is collapsed Assert.ok(div, "Advanced content div should exist"); Assert.equal( div.ownerGlobal.getComputedStyle(div).display, "none", "Advanced content should not be visible by default" ); }); // Tweak the expert mode pref Services.prefs.setBoolPref("browser.xul.error_pages.expert_bad_cert", true); promise = BrowserTestUtils.waitForErrorPage(gBrowser.selectedBrowser); gBrowser.reload(); await promise; await remote(() => { let div = content.document.getElementById("badCertAdvancedPanel"); Assert.ok(div, "Advanced content div should exist"); Assert.equal( div.ownerGlobal.getComputedStyle(div).display, "block", "Advanced content should be visible by default" ); }); // Clean up gBrowser.removeCurrentTab(); if ( Services.prefs.prefHasUserValue("browser.xul.error_pages.expert_bad_cert") ) { Services.prefs.clearUserPref("browser.xul.error_pages.expert_bad_cert"); } });