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Fix No Video with Supported Format and MIME type found

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Modern websites are incomplete without videos. Be it Facebook, YouTube, or Twitter, videos have become the heart of the internet. However, due to some reason, videos on your Firefox browser refuse to play. If you find yourself struggling with the same issue, you are at the right place. We bring to you a helpful guide that will teach you how to fix No Video with Supported Format and MIME type found error on Firefox.

Fix No Video with Supported Format and MIME type found

Fix No Video with Supported Format and MIME type found

What causes the No Video with Supported Format error?

Ever since the arrival of HTML 5, media errors on the internet have become common. After Adobe flash player was discontinued, HTML 5 became the ideal replacement. Being a safer and faster markup language, HTML 5 is highly sensitive to issues on your PC. These include outdated browsers, corrupt cache files, and intrusive extensions. Luckily, the “No Video with Supported Format” error can be fixed with a few easy steps.

Method 1: Update Firefox

Playing videos on outdated browsers is a challenging task. Many times, older versions are unable to register new media encoders and struggle to play videos.

1. Open Firefox and click on the hamburger menu in the top right corner of the screen.

2. From the options, select Help.

click on Help | Fix No Video with Supported Format and MIME type found

3. Click on About Firefox.

Click on about Firefox

4. A window will appear on your screen. If your browser is not up to date, you will get the option to download the latest version.

Confirm if your browser is up to date | Fix No Video with Supported Format and MIME type found

5. Play the video again and see if you’re able to fix No Video with Supported Format error.

Method 2: Clear Browser Cache and Cookies

Cached cookies and data can slow down your PC and cause unwanted errors. Moreover, corrupt cookies prevent sites from loading media files which results in the “No Video with Supported Format” error.

1. Open Firefox and select the hamburger menu

2. Click on Options.

Click on options

3. Go to Privacy and Security from the panel on the left.

Go to privacy and security | Fix No Video with Supported Format and MIME type found

4. Scroll down to Cookies and Site Data and click on Clear Data button.

Go to Cookies and Site data and click on clear data

5. Enable both the checkboxes and click on Clear.

enable both boxes and click on clear | Fix No Video with Supported Format and MIME type found

6. Scroll further down to the History panel and click on Clear History button.

Click on Clear history

7. Change the time range from Last Hour to Everything.

8. Select all the checkboxes and click on OK.

Select all check boxes and click on OK | Fix No Video with Supported Format and MIME type found

9. This will clear all cached storage and saved cookies. Play the video again and see if it fixes the “No Video with Supported Format” error.

Also Read: Fix YouTube Videos loading but not playing videos

Method 3: Disable Browser Add-ons

Similar to the extensions on Chrome, Firefox introduced Add-ons to make browsing more fun. While these services can enrich your online experience, they interfere with online activity. Try disabling a few addons to fix the “No Video with Supported Format” error.

1. Click on the hamburger menu and select Add-ons and Themes.

Select add ons and themes

2. Go to Extensions from the panel on the left.

Click on extensions | Fix No Video with Supported Format and MIME type found

3. Find the extensions that could cause errors during playback.

4. Click on the three dots and select Remove.

Click on the three dots and select remove

5. Reload the website and see if the video plays.

Method 4: Use Another Browser

While Mozilla Firefox has done a commendable job over the years, it has not caught up with the speed and efficiency of Google Chrome. If all the aforementioned steps fail, it is time to bid adieu to Firefox and try other options. On your browser go to Google Chrome’s installation page and download the app. Your videos should run properly.

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We hope this guide was helpful and you were able to fix No Video with Supported Format and MIME type found error on Firefox. Let us know which method worked for you best. If you have any queries regarding this article, then drop them in the comments section.

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Advait Varma

Advait is a freelance technology writer who specializes in tutorials. He has five years of experience writing how-tos, reviews, and tutorials on the internet.

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