SimpleTest.waitForExplicitFinish(); // This test loads in an iframe, to ensure that the navigator instance is // loaded with the correct value of the preference. SpecialPowers.pushPrefEnv({ set: [["dom.netinfo.enabled", true]] }, () => { let iframe = document.createElement("iframe"); iframe.id = "f1"; iframe.src = "test_navigator_iframe.html"; document.body.appendChild(iframe); });