Bug 1582600 - Intermittent toolkit/components/pictureinpicture/tests/browser_togglePointerEventsNone.js - Test timed out
Filed a bug from that review Bug 1594505 - Make sure PictureInPicture object is the only object that interacts with the player window directly
Pro tip : enable this preference if you are testing PictureInPicture : media.videocontrols.picture-in-picture.audio-toggle.enabled (you can mute… someone in a video)
Talked of weak references
Bug 1505495 - consider geckoprofiling to be run at the end of every normal test run and upload artifacts for every run
Great walkthrough of Treeherder
TODO: Consider calling stopTrackingMouseOverVideos in willDestroy in PictureInPictureChild