User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:104.0) Gecko/20100101 Firefox/104.0

Steps to reproduce:

1. Enable EGL
2. Enable VAAPI
3. Watch a video such as https://twitter.com/i/status/1550834928480407552

Actual results:

Video shows corrupt contents with a blue tone eventually freezes Firefox and whole system requiring power button poweroff. Happens on current stable version too.

Expected results:

Show video either using VAAPI or fallback to ffmpeg decoding.

inxi -G
Graphics:
Device-1: NVIDIA C79 [GeForce 9400M] driver: nouveau v: kernel
Device-2: Apple Built-in iSight type: USB driver: uvcvideo
Display: x11 server: X.Org v: 21.1.3 with: Xwayland v: 22.1.3 driver: X:
loaded: modesetting unloaded: fbdev,vesa gpu: nouveau
resolution: 1280x800~60Hz
OpenGL: renderer: NVAC v: 3.3 Mesa 22.1.3

The Bugbug bot thinks this bug should belong to the 'Core::Audio/Video: Playback' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Can you share your about:support? "Copy text to clipboard" -> paste in comment -> bugzilla will ask to make it an attachment -> yes

Unfortunately it will have to wait since I am in quarantine because of covid 19 and that particular laptop is at my workplace. I will submit this information in a week. Thanks for caring.

(In reply to Robert Mader [:rmader] from comment #3)

Can you share your about:support? "Copy text to clipboard" -> paste in comment -> bugzilla will ask to make it an attachment -> yes

Hello

Here is the information needed.

On Firefox 110.0.1 (64-bit) on openSUSE Tumbleweed / nouveau 23.0 / kernel 6.2.1 this issue has been resolved.
Tested on Twitter and https://archive.org/details/BigBuckBunny_124 (h264 file selected)

inxi -G
Graphics:
Device-1: NVIDIA C79 [GeForce 9400M] driver: nouveau v: kernel
Display: wayland server: X.org v: 1.21.1.7 with: Xwayland v: 22.1.8
compositor: kwin_wayland driver: X: loaded: modesetting unloaded: fbdev,vesa
dri: nouveau gpu: nouveau resolution: 1280x800
API: OpenGL v: 3.3 Mesa 23.0.0 renderer: NVAC

This issue recently popped up again so I did a Mozilla regression test(GUI). The application shows this as a result:
2023-05-09T14:21:23.566000: DEBUG : Found commit message:
Bug 1812030 - Fix pref observers in nsCookieInjector. r=timhuang

• Fix typo in IsEnabledForCurrentPrefState leading to component not enabling if
  one of the service modes was set to disabled.
• Clean up pref observer code by moving list of prefs to array.

Differential Revision: https://phabricator.services.mozilla.com/D167664

2023-05-09T14:21:23.566000: DEBUG : Did not find a branch, checking all integration branches
2023-05-09T14:21:23.574000: INFO : The bisection is done.
2023-05-09T14:21:23.612000: INFO : Stopped

Please file a new bug as it's a new regression. Does this only occur if you force-enable hardware video decoding / vaapi? (Please put the answer in the new bug report.)