The about:home redesign in bug 711157 somehow ended up making a bunch of known oranges and timeouts more reproducible (like hitting at each run or such). Using that fact I added some more breathing to some of these tests, allowing them to pass, most of those were on the timeout edge or hitting timing issues. This patch helped moving from permaorange to green.
Created attachment 605985 [details] [diff] [review] patch v1.0
Pushed to fx-team: https://hg.mozilla.org/integration/fx-team/rev/3e5ece41d748