Friday, September 30, 2022

FIX: ‘No Video With Supported Format And MIME Type Found’ Error

Are you getting the ‘No Video With Supported Format And MIME Type Found’ error while trying to stream a video on Firefox?

Initially, the video loads but after some time a white cross button appears in the middle of the video along with the error message.

This error is more common while playing Facebook videos on Firefox.

Here I have discussed how to fix this error and play video without issues on Firefox.

How To Fix “No Video With Supported Format And MIME Found” Error

Follow the methods below when you cannot play video content on Firefox to fix the issue.

Also, know what to do when Firefox won’t play YouTube Videos.

1) Update Firefox

If your web browser is outdated, then it may not support the video format.

So, update Firefox and then try playing the video. To update Firefox, follow the steps given below:

  • Open Mozilla Firefox and expand the Hamburger menu from the upper right corner of the page.
  • Click on Help from the given options.


  • Select About Firefox.


  • Now you will find the option to update the web browser if it is not yet updated to the latest version.


  • After updating Firefox, try to play the video again.

If you find the “No video with supported format and MIME found” error again, then go to the next step.

2) Clear Browser Cache

The accumulated browser cache and data may get corrupted.

This corrupted data may prevent the site from loading the video content, and so you get a “no video with supported format and mime type found” error on Firefox.

So, delete the browser cache and cookies to fix the problem. Here is how to do it:

  • Open Firefox and expand the menu.
  • Scroll down to the History panel and click on the Clear Recent History button.


  • Set the Time Range to Everything to delete all the history saved.
  • Check all the boxes under the History option and click on the OK button.


3) Remove Add-ons

Add-ons in Firefox are similar to the extensions in Chrome. We often use these services to get a better online experience.

But these add-ons sometimes cause problems and can cause the ‘no video with supported format’ error.

So, remove any problematic add-ons following the steps given below:

  • Open the Firefox menu and click on Add-ons and Themes.
  • Select extensions and then remove the extensions one by one. To do that, click on the three dots beside the extension and select the Remove button.


  • Try to play the video after you have removed each extension. This way you can identify exactly which extension was causing the problem.

4) Open Firefox in the Troubleshooting Mode

You can also open Firefox in troubleshooting mode if you do not want to remove the add-ons manually.

In the Troubleshooting mode the add-ons are temporarily disabled.

Follow these steps to open Firefox in troubleshooting Mode:

  • Open the Firefox menu and click on the Help option.
  • Next, choose Troubleshoot Mode as shown below.


  • Click on the Restart button and Firefox will open in Troubleshoot Mode.
  • Now try to play the video content. If you again get the same error, then go to the next solution.

5) Reinstall Firefox

If no other solution worked for you, reinstall Firefox.

The web browser may have become corrupted, which can be causing this error.

To reinstall Firefox, follow the steps given below:

  • Open Run by pressing Windows + R keys. Enter appwiz.cpl in the Run command box and press the Enter key.


  • From all your installed apps, locate Firefox. Click on the Uninstall button and follow the on-screen instructions to complete the process.


After uninstalling Firefox, download Firefox from the official website.

6) Try Another Browser

If you still cannot play the particular video after reinstalling Mozilla Firefox, then try playing the video on another browser.

Some videos may be unsupported on Firefox. Switch to another browser and check if you can play the video there.

Frequently Asked Questions [FAQs]

Here are some frequently asked questions by the users who found errors while playing  videos on Firefox:

  1. How do I fix the ‘No video with supported format and MIME type found’ error?

To fix ‘No video with supported format and MIME type found’ error, update Firefox, clear browser cache and cookies, open Firefox in troubleshooting mode, and try to play the video using another browser.

  1. How do I play MIME-type videos?

To play MIME-type videos, clear the browser cache, remove add-ons, update Firefox and try a different web browser.

  1. How do I fix the MIME type error?

To fix the MIME type error, first ensure that the file names used in the link and your file name are the same.

Closing Up

Hope after following the above solutions, you can play the video successfully. For any further issues, ask us in the comments section provided below.

Sanchita Das
Sanchita Das
Creative and focused. Always ready to learn new techniques and improvise accordingly. Loves to meet new challenges and explore new possibilities.

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