"use strict"; var gTestTab; var gContentAPI; var gContentWindow; add_task(setup_UITourTest); add_UITour_task(function*() { ok(!gBrowser.selectedBrowser.currentURI.spec.startsWith("about:reader"), "Should not be in reader mode at start of test."); yield gContentAPI.toggleReaderMode(); yield waitForConditionPromise(() => gBrowser.selectedBrowser.currentURI.spec.startsWith("about:reader")); ok(gBrowser.selectedBrowser.currentURI.spec.startsWith("about:reader"), "Should be in reader mode now."); });