add_task(async function() { let keyUps = 0; await BrowserTestUtils.openNewForegroundTab(gBrowser, "data:text/html,"); gURLBar.focus(); window.addEventListener("keyup", function(event) { if (event.originalTarget == gURLBar.inputField) { keyUps++; } }, {capture: true, once: true}); gURLBar.addEventListener("keydown", function(event) { gBrowser.selectedBrowser.focus(); }, {capture: true, once: true}); EventUtils.synthesizeKey("v", { }); is(keyUps, 1, "Key up fired at url bar"); gBrowser.removeCurrentTab(); });