We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

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.

Avatar for Username

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

This thread was archived. Please ask a new question if you need help.

Firefox v 19.0.2 won't play videos gives Mime type error message

  • 4 replies
  • 10 have this problem
  • 1 view
  • Last reply by S1

GeorgeRoland
GeorgeRoland
more options

Using Firefox v. 19.0.1 on Mac 15' Macbook Pro running OS X 10.8.3. Trying to play videos. Have webm and MP4 version videos to play. Code works fine and videos play in Firefox on my machine. When downloading web pages from the server I get "No video supported format & Mime type found" error messages.

HOw does one fix this?

Thanks,

George

Using Firefox v. 19.0.1 on Mac 15' Macbook Pro running OS X 10.8.3. Trying to play videos. Have webm and MP4 version videos to play. Code works fine and videos play in Firefox on my machine. When downloading web pages from the server I get "No video supported format & Mime type found" error messages. HOw does one fix this? Thanks, George

Chosen solution

You may need the flash player required to play those types of files or you may need to update your plugins.

Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

Read this answer in context 👍 5

All Replies (4)

Andrew
Andrew
  • Moderator
more options

Chosen Solution

You may need the flash player required to play those types of files or you may need to update your plugins.

Please check if all your plugins are up-to-date. To do this, go to the Mozilla Plugin Check site.

Once you're there, the site will check if all your plugins have the latest versions. If you see plugins in the list that have a yellow Update button or a red Update now button, please update these immediately.

To do so, please click each red or yellow button. Then you should see a site that allows you to download the latest version. Double-click the downloaded file to start the installation and follow the steps mentioned in the installation procedure.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

If this happens on YouTube then try to opt-out of HTML5 (Firefox doesn't support MP4 via a video tag).

Modified by cor-el

GeorgeRoland
GeorgeRoland Question owner
more options

Thanks for the info. I checked my plugins as was suggested, and my Shockwave player was not up-to-date. Updating this plug-in fixed the problem for me.

Many thanks,

George

S1
S1
more options

Problem solved! I downloaded and installed Firefox 24.0 Beta. Apparently Mozilla programming team made all the right changes in the new release. Now all videos starting working on Yahoo and BBC and other sites

Link: http://www.mozilla.org/en-US/firefox/channel/#beta