1417812 - block-autoplay-until-in-foreground not work for pinned tabs anymore

Status: RESOLVED INVALID

(Core :: Audio/Video: Playback, defect, P3)

Description

[Akhristenko]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0
Build ID: 20171115095343

Steps to reproduce:

set option media.block-autoplay-until-in-foreground to true
open some site with media(for example youtube)
pin this tab
restart firefox


Actual results:

media content starts playing even if I did not switch to this tab


Expected results:

media content do not starts playing until i switch to this tab(as it works now in 55 firefox)

Comment 1

[Blake Wu [:bwu][:blakewu]]

IIRC, it is by design. 
Mark,
Can you help us check it?

Comment 2

[Mark Liang(:mark_liang)]

(In reply to Blake Wu [:bwu][:blakewu] from comment #1)
> IIRC, it is by design. 
> Mark,
> Can you help us check it?

Yes it's expected, pinned tab is a tricky case. If a user pin a visited tab (foreground tab), the autoplay in that tab will not be blocked, and the browser will remember that even if you restart the browser (open a new session). Media will start playing when the pinned tab is loaded in the background.

The reason behind this behavior is that users often pin websites such as Gmail, Calendar or Facebook, and they want to hear the notification sounds from those tabs. This behavior allows users to visit those tabs once, and the media from those tabs will remain unblocked even if you restart the browser and haven't visited those tabs yet.

Comment 3

[Blake Wu [:bwu][:blakewu]]

Mark,
Thanks for this explanation. 

I am going to close this bug as invalid.

Comment 4

[Blake Wu [:bwu][:blakewu]]

Hi Akhristenko, 
Thanks for reporting this issue. 
This is by design. Please check comment 2.