www.sportsnet.ca - see bug description

[meter1060]

URL: http://www.sportsnet.ca/hockey/world-cup-of-hockey/world-cup-of-hockey-power-rankings-team-canada-usa-russia-north-america-sweden-europe-finland-czech-2016/
Browser / Version: Firefox Mobile 51.0
Operating System: Android 6.0.1
Problem type: Something else - I'll add details below

Steps to Reproduce

1. Navigate to: http://www.sportsnet.ca/hockey/world-cup-of-hockey/world-cup-of-hockey-power-rankings-team-canada-usa-russia-north-america-sweden-europe-finland-czech-2016/
2. Either navigate away from the tab before the video starts playing or navigate to another tab while the video is playing (action bar needs to be visible). Tab with video can also be closed.

Expected Behavior: Video is not present in current tab

Actual Behavior: Video displays over current tab and does not stop playing when tab is closed.

From webcompat.com with ❤️

[MDTsai]

I can reproduce on Firefox mobile 51, but not in Firefox mobile 50. Since this is a specific Firefox mobile version issue, I will close and see if I can get someone help on this.

[MDTsai]

Refer to https://bugzilla.mozilla.org/show_bug.cgi?id=1303672