1680098 - Some cbs.com Videos Fail to Play on Firefox

Status: RESOLVED WORKSFORME

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

Description

[Haik Aftandilian [:haik]]

Attachment: Screen Shot Showing Playback Error

Videos such as https://www.cbs.com/shows/star-trek-discovery/ fail to play on Firefox, but work on Chrome. Tested on Firefox 83 on macOS 11 Big Sur. Reloading the page sometimes gets the video to playback.

From the browser console,

MediaKeySystemAccess::GetKeySystemStatus(com.widevine.alpha) result=available msg='' 2
HTMLMediaElement.setMediaKeys promise rejected 0x8053000b 'A MediaKeys object is in attaching operation.'
MediaKeySession.close promise rejected 0x8053000b 'MediaKeySession.Close() called before sessionId set by CDM'```

Comment 1

[Haik Aftandilian [:haik]]

Attachment: MOZ_LOG=sync,timestamp,MediaDemuxer:5,MediaDecoder:5,PlatformDecoderModule:5,MediaDecoderStateMachine:5,MediaSource:5,MediaSourceSamples:5,MediaFormatReader:5

Logging collected during failed video playback using MOZ_LOG=sync,timestamp,MediaDemuxer:5,MediaDecoder:5,PlatformDecoderModule:5,MediaDecoderStateMachine:5,MediaSource:5,MediaSourceSamples:5,MediaFormatReader:5

Comment 2

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

Do you know if this has regressed recently? Bug 1675360 is one recent thing that could lead to this (and that should hopefully have a fix shortly).

Comment 3

[Haik Aftandilian [:haik]]

I haven't used the site previously so I don't know if it used to work. The problem reproduces on 78.5.0esr. I used mozregression to test builds from earlier in the year and get a different failure: infinite site spinner. Older versions of Firefox don't work on Big Sur, but maybe we could get a regression window using an older macOS version.

Comment 4

[Bryce Seager van Dyk [:bryce] (he/him) - Not reading bugmail]

NI to buy a sub and test.

Comment 5

[Jim Mathies [:jimm]]

Sounds like some sort of a site or webcompat issue.

I can reproduce on Windows 10.

Comment 6

[John Lin [:jhlin][:jolin]]

CBS.com is now Paramount+ and the show can be played in the latest build (Firefox 145) on macOS 26. Closing as WORKSFORME.