1480307 - Non-remembered autoplay permission grants should last the lifetime of the tab, not be one off

Status: RESOLVED DUPLICATE of bug 1477273

(Core :: Audio/Video: Playback, defect, P2)

Description

[Chris Pearce [:cpearce (Not reading bugmail)]]

If users are faced with an autoplay-media permission prompt and they click "allow" but don't have "remember" checked, and then the site tries to play another video or again, they'll be prompted again for permission to autoplay.

STR:
1. In Nightly, open http://pearce.org.nz/video/autoplay-twice.html
2. When prompted to approve autoplay, uncheck "remember" and click "allow".

Expected result: video plays
Observed result: another permission prompt pops up.

Given that the user has already granted the tab permission to autoplay, it seems unnecessary to prompt them again for permission.

In the above test case when the video plays the first time, script pauses and then tries to play again. This problem was also observed in the wild on Apple.com's Mac Pro page.