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

Videos are not working in Firefox

  • 4 ŋuɖoɖowo
  • 5 masɔmasɔ sia le wosi
  • 19 views
  • Nuɖoɖo mlɔetɔ bpowell

more options

Hey everyone,

This seems to be a common problem, but videos are not working on Firefox, and not just for YouTube. I have updated Adobe Shockwave and Flash, re-installed Firefox, deleted/created a Firefox profile, started up Firefox in Safe Mode, turned off HTML5, checked if any of my plug-ins are disabled, and none of those have helped.

When I get on YouTube and click a video, the video itself doesn't even load. On other sites, in the box where the video should be playing, it says "No video with supported format and MIME content can be found." This kind of confuses me because I have updated the Adobe Flash.

Thoughts? Anything would be appreciated at this point.

-- Brynn

Hey everyone, This seems to be a common problem, but videos are not working on Firefox, and not just for YouTube. I have updated Adobe Shockwave and Flash, re-installed Firefox, deleted/created a Firefox profile, started up Firefox in Safe Mode, turned off HTML5, checked if any of my plug-ins are disabled, and none of those have helped. When I get on YouTube and click a video, the video itself doesn't even load. On other sites, in the box where the video should be playing, it says "No video with supported format and MIME content can be found." This kind of confuses me because I have updated the Adobe Flash. Thoughts? Anything would be appreciated at this point. -- Brynn

Ŋuɖoɖo si wotia

"No video with supported format and MIME content can be found" is displayed when the HTML5 media player is used and not the Flash player and there is no media file specified that Firefox can use.

You can try to toggle the media.directshow.enabled pref on the about:config page.

You can open the about:config page via the location bar and you can accept the warning and click "I'll be careful" to continue

Xle ŋuɖoɖo sia le goya me 👍 0

All Replies (4)

more options

Hello,

Some problems with Flash video playback can be resolved by disabling hardware acceleration in your Flash Player settings. (See this article for more information on using the Flash plugin in Firefox).

To disable hardware acceleration in Flash Player:

  1. Go to this Adobe Flash Player Help page.
  2. Right-click on the Flash Player logo on that page.
  3. Click on Settings in the context menu. The Adobe Flash Player Settings screen will open.
  4. Click on the icon at the bottom-left of the Adobe Flash Player Settings window to open the Display panel.

    The image "fpSettings1.PNG" does not exist.
  5. Remove the check mark from Enable hardware acceleration.
  6. Click Close to close the Adobe Flash Player Settings Window.
  7. Restart Firefox.

This Flash Player Help - Display Settings page has more information on Flash Player hardware acceleration, if you're interested.

Does this solve the problem? Let us know.

more options

Ɖɔɖɔɖo si wotia

"No video with supported format and MIME content can be found" is displayed when the HTML5 media player is used and not the Flash player and there is no media file specified that Firefox can use.

You can try to toggle the media.directshow.enabled pref on the about:config page.

You can open the about:config page via the location bar and you can accept the warning and click "I'll be careful" to continue

more options

I unchecked the box, but after restarting Firefox it still didn't work.

more options

So I managed to fix it. By enabling HTML5 the videos are showing again.

Thank you for your replies!