1354992 - Sound is briefly audible in a muted tab with Flash

Status: RESOLVED WONTFIX

(Core Graveyard :: Plug-ins, defect, P3)

Description

[684sigma]

I have a problem with Firefox Beta 53. It also happens in Nightly 55.
Sometimes sound is briefly audible in a muted tab with Flash. There're 2 ways to reproduce it:

First: 
1. Open new tab.
2. Mute the tab.
3. Open http://dagobah.net/flash/spinners.swf in that tab.

Result: sound is briefly audible.
Expected: no sound.


Second:
1. Open http://dagobah.net/flash/spinners.swf
2. Mute tab once it produces sound.
3. Ctrl+Shift+Click on reload button in location bar five times.

Result: Each opened background tab briefly produces sound.
Expected: No sound from background tabs.

Comment 1

[Loic]

(In reply to 684sigma from comment #0)
> I have a problem with Firefox Beta 53. It also happens in Nightly 55.
> Sometimes sound is briefly audible in a muted tab with Flash. There're 2
> ways to reproduce it:
> 
> First: 
> 1. Open new tab.
> 2. Mute the tab.

It's impossible to do that, new tab have no sound to mute.

Comment 2

[684sigma]

(In reply to Loic from comment #1)
> > 1. Open new tab.
> > 2. Mute the tab.
> 
> It's impossible to do that

Right-click on the tab. Click "Mute tab".

Comment 3

[Anthony Jones (:ajones, :kentuckyfriedtakahe, :k17e)]

This isn't an HTML video issue.

Comment 4

[Emil Ghitta, QA [:emilghitta]]

I managed to reproduce this issue by following this steps:

1. Access the following link: http://www.addictinggames.com/action-games/severe-road-game.jsp
2. Start a new game.
3. Mute the tab.

Actual Result: Sound can be heard for a couple of seconds after muting the tab.

Expected Result: No sound is heard as soon as the tab was muted.

This issue was reproduce on the following flash versions:

27.0.0.187
28.0.0.126
28.0.0.129 Beta

Comment 5

[Timea Cernea [:tbabos][inactive]]

The issue can also be reproduced on Windows 7:

Nightly 65.0a1 (2018-10-31) (32-bit)
Beta 64.0b5 (32-bit)
63.0 (32-bit)

1. Go to the following link: http://abeall.com/#/artist
2. Allow Flash Player
3. After the music starts mute the tab

Actual: The sound will not be muted. 


Please note that I can reproduce this issue only on x32 bits Firefox versions. On x64 it works as expected.

Comment 6

[laszlo.bialis]

The issue is present on Nightly 66.0a1 (20190107214730) also, reproduced with the above steps on Win8 x32.

Comment 8

[Liviu Seplecan]

Tested this issue on Windows 7 x64 on latest Nightly 68.0a1 (7th of May 2019) but without success - cannot reproduce it.

Comment 9

[Liviu Seplecan]

Tested this issue on Mac OS X 10.13.6 on the latest Nightly 69.0a1 (27 of May 2019)- cannot reproduce it.

Comment 10

[BMO Automation]

Resolving as wont fix, plugin support deprecated in Firefox 85.