// Empty select to make sure that we click on the menulist button. const PAGE = ` `; function tick() { return new Promise(r => requestAnimationFrame(() => requestAnimationFrame(r)) ); } add_task(async function () { const url = "data:text/html," + encodeURI(PAGE); await BrowserTestUtils.withNewTab( { gBrowser, url, }, async function (browser) { await openSelectPopup("click"); await SpecialPowers.spawn(browser, [], () => { is( content.document.activeElement, content.document.querySelector("select"), "Select is the active element" ); ok( content.document.querySelector("select").matches(":focus"), "Select matches :focus" ); }); await hideSelectPopup(); } ); });