Environment: Aurora 51.0a2 Device: Samsung Galaxy S6 EDGE (Android 6.0); Build: Aurora 51.0a2 (2016-10-02); Steps to reproduce: 1. Open two tabs, one with youtube, the other with goo.gl/ZClrcM 2. Let the youtube video play and switch to the HLS tab 3. Play the HLS video 4. Go back to the youtube tab and press play Expected result: @ step 3 : Youtube video stops playing @ step 4: 1. HLS video should be paused when the youtube resume button is pressed (see bug 1307074 ) 2. Yhe youtube video is resumed correctly and continues playing Actual result: @ step 3 : Youtube video stops playing @ step 4 : Youtube video player resumes but the video is broken, displaying a blank page with the audio correctly played in the background Notes: This issue occurs mostly from after the first try This also occurs when interruping a webm video (http://www.webmfiles.org/demo-files/) For further details please check https://www.youtube.com/watch?v=DOzbrTgxlxM&feature=youtu.be

Too late for firefox 52, mass-wontfix.

Cannot reproduce this bug in nightly/59 (because of the native HLS playback support in bug 1345752, I believe). Mihai, could you help confirm that, please? Thanks a lot.

Tested again on latest Nightly build, and the issue is not reproducible. Tried with both youtube videos and webm files. Devices: Nexus 5 (Android 6.0.1) and Google Pixel (Android 8.0).

The reporter tested the HLS feature without native supporting. Since the HLS feature will be phased into Beta 59 and it cannot be reproducible, I mark this as fixed. Please feel free to reopen it if someone meets the same issue again.