Video Format or MIME type is not supported error in Firefox [Fix]

When you try to play a video on the firefox browser sometimes you will get the Video format or MIME type is not supported error. This may be due to some functionality error or the browser having some issue with certain video formats.

What is Video format or MIME type is not supported error?

You will get an error like “No video with supported format and MIME type found” which means that the Firefox HTML5 video player was not able to play the format of the video provided by the website.

Fix Video format or MIME type is not supported error in Firefox

Follow the below methods and steps one by one to fix this Video format or MIME type is not supported error.

Method 1: Clear Cookies and Cache

Corrupted cookies and cache may cause these types of errors. Clearing both of them may fix this issue.

Step 1:

Open the Firefox browser and click on the hamburger menu button in the top right side corner.

Step 2:

Then click on the options and select the privacy and security in left side menu.

Step 3:

Scroll down to the Cookies & Site Data section and click on the Clear Data button.

Step 4:

Make sure that, both the cookies & site data and cache web content options are checked. Now click on the Clear button to clear the cookies and cache of the Firefox browser.

That’s it.

Method 2: Install Adobe Flash Player

You can play a video without an adobe flash player. But sometimes it’s required to play Adobe Flash Player supported video. So install the adobe flash player and play the video on your browser.

You can download the Adobe flash player with this URL on the official website: https://get.adobe.com/flashplayer/otherversions/.


If you already have adobe flash player installed on your computer, try reinstalling it.

Frequently Asked Questions:

How do I fix no video with supported format and mime type found in Firefox?

You can fix this issue by clearing cookies and cache, and installing or re installing adobe flash player.

How do I fix no video with supported format and mime?

You can fix no video with supported format and mime by using different browser or enabling JavaScript or installing flash player or plugin.

How to fix no video with supported format and mime type found firefox linux

You can fix this issue by starting firefox in safemode, enabling hardware acceleration in firefox, clearing cookies and browser cache.

Hope you were able to fix the Video format or MIME type is not supported error in Firefox with the help of our tutorial. Do let us know your comments below if you are still facing the issue.

About The Author: Navaneethan is a fulltime technical writer who writes how-to tutorials in an easy step by step way. He has good technical knowledge of using Windows OS for 5 years and how to fix errors.

Don’t Miss Our Tips & Tutorials!

We don’t spam! Read more in our privacy policy

0 comments… add one

Leave a Reply

Your email address will not be published. Required fields are marked *