"use strict"; const PREF = "network.cookie.cookieBehavior"; const PAGE_URL = "http://mochi.test:8888/browser/" + "browser/components/sessionstore/test/browser_1234021_page.html"; const BEHAVIOR_REJECT = 2; add_task(async function test() { await pushPrefs([PREF, BEHAVIOR_REJECT]); await BrowserTestUtils.withNewTab( { gBrowser, url: PAGE_URL, }, async function handler(aBrowser) { await TabStateFlusher.flush(aBrowser); ok(true, "Flush didn't time out"); } ); });