This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Video streaming is blocked

  • 2 replies
  • 1 has this problem
  • 1 view
  • Last reply by James

more options

I recently switched to Pop!_OS and i facing few problems playing/stream video on twitch and some other websites but, only youtube is working both video playback and live streaming. If i switch to other browser i does work. Twitch shows : This video is either unavailable or not supported in this browser. (Error #4000) my extensions : ublock origin, DuckDuckGo Privacy Essentials

I recently switched to Pop!_OS and i facing few problems playing/stream video on twitch and some other websites but, only youtube is working both video playback and live streaming. If i switch to other browser i does work. Twitch shows : This video is either unavailable or not supported in this browser. (Error #4000) my extensions : ublock origin, DuckDuckGo Privacy Essentials

Modified by Priyank Godhani

All Replies (2)

more options

Make sure you have FFmpeg installed/enabled.

more options

Yes the FFmpeg is needed to fully support HTML5 players like used at Twitch and Youtube. Youtube may still seem to work without FFmpeg depending on codec being used.

Firefox does not use Gstreamer for a while now since Fx 46.0 and later.

Proprietary multimedia formats and such are not normally included in Linux installs by default.

Youtube used to have a nice page to check for HTML5 codecs support at youtube.com/html5/ but it is limited now.

Modified by James