ge gets into and out of BFCache, as explicitly noted in the spec:
// https://html.spec.whatwg.org/multipage/interaction.html#focused-area-of-the-document
// "Even if a document is not fully active and not shown to the user, it can still
// have a focused area of the document. If a document's fully active state changes,
// its focused area of the document will stay the same."
runBfcacheTest({
  openFunc: (url) => window.open(url + '&events=pagehide,pageshow,load',
                               '_blank', 'no