5a1af9a0bb
I looked into using gInitialPages instead of hard-coding "about:blank", but: - there's no convenient window or browser here to access gInitialPages - We hard-code "about:blank" many other places in source, so its "specialness" is already pretty well established. Original Revision: https://phabricator.services.mozilla.com/D254871 Differential Revision: https://phabricator.services.mozilla.com/D258221