(In reply to Gian-Carlo Pascutto [:gcp] from comment #61)
> >Can you please clarify what does fix-optional status for firefox 100 mean 
> >for this bug?
> 
> It means that if there is a simple fix for the issue, release management 
> would've considered taking that fix into Firefox 100. As is hopefully rather 
> obvious, there isn't going to be a simple fix for this. It needs a ton of 
> work - that has progressed well, thankfully.
> 
> >I assume this bug will be fixed once video decoding has been moved to a 
> >utility process (bug 1722051).
> 
> The utility process makes it easier to move things in a separate processes 
> each with a custom sandbox, but the plan is to fix the current RDD process 
> for VA-API support before we consider that. The difficulty is adding support 
> for exactly those features VA-API needs - multiplied by each video driver 
> having slightly different requirements. Once the sandboxing code supports 
> that we can look if there'd be a meaningful security benefit in moving things 
> around.

Is  there an official way of working around this in the meantime? Since
disabling RDD sandbox isn't enough anymore on Firefox 100?

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https://bugs.launchpad.net/bugs/1964547

Title:
  [upstream] RDD sandbox prevents HW-accelerated video playback

Status in Mozilla Firefox:
  Confirmed
Status in firefox package in Ubuntu:
  Confirmed

Bug description:
  • Ubuntu 21.10 (64 bit)
  • Firefox 98 installed via apt (cookies & cache have been cleared)
  • Kernel 5.13.0-30-generic x86_64
  • Tried on both wayland and X11 session → same result

  Steps to reproduce:
  (1) Visit https://www.youtube.com
  (2) Choose one of the video

  Actual Result:  Video doesn't play

  What Expected:  Video Play normally

  Previously it was normal on Firefox 97 (apt version)

  Tried installing Firefox 98 Snap version and it works normally

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