1
Why does Firefox 57 Quantum not play remote audio over a MSTSC remote desktop connection?
Tamara Wijsman
Posted 2017-11-15T21:38:09.097
Reputation: 54 163
Firefox 57 Quantum doesn't play remote audio over a remote desktop connection
Answers
4
According to the FireFox 57.0 release notes citing unresolved issues:
Users running Firefox for Windows over a Remote Desktop Connection (RDP) may find that audio playback is disabled due to increased security restrictions. Learn how to mitigate this issue until it is corrected in an upcoming release
The notes include a link to a support article that includes instructions for implementing a workaround that will reduce(!) the sandbox security level:
In the address bar, type
about:configand press Enter.- The about:config "This might void your warranty!" warning page may appear. Click I accept the risk! to continue to the about:config page.
Search for
security.sandbox.content.leveland set it to 2.- Restart Firefox on the remote device.
I say Reinstate Monica
Posted 2017-11-15T21:38:09.097
Reputation: 21 477
0
This issue should be resolved in Firefox 59 or higher. It isn't mentioned any longer in the release notes under "unresolved issues".
However, if you're still having the same problem in Firefox 59 or higher, try closing Firefox and the RDP session and reopening both to reset the audio session settings. Worked for me, even without lowering the sandbox level.
Ruben
Posted 2017-11-15T21:38:09.097
Reputation: 1
1
More details on above change from Mozilla Wiki - Security - Sandbox - Windows - Content reveal that level 3 imposes restrictions and limits upon 2, such as the the clipboard, handles, global atoms and extension functionality. Effectively disabling audio playback which uses handles and/or global atoms.
– Tamara Wijsman – 2017-11-15T21:47:46.663