No Video With Supported Format And MIME Type Found [Solved]

Most of the Firefox users are familiar with this ‘No video with supported format and MIME found’ issue. The issue can spread from Facebook to any live video platform. If you are one of the victims of this issue, then don’t worry. We have prepared numerous solutions to fix this issue.

We have investigated the error and found several reasons behind it. Mostly, the caches and cookies in the Mozilla Firefox browser is the culprit in this case. Mozilla Firefox can behave such when you own the Windows KN and N editions. Also, the plug-ins of the browser can restrict you to surf your favorite videos on Firefox.

Top-notch Solutions to Fix No Video With Supported Format and MIME Type Found: 

If you notice the error for the first time, you can reload the Firefox browser. Sometimes, reloading may eradicate the issue. But if you are encountering the same issue over a long time, then you have to go through the fixes below.

Before you proceed with all these fixes, it is better to export all other data related to the browser. You should export all the bookmarks of your browser. It is possible that you might lose the Firefox data after applying the fixes.

Fix 1: Clear Cookies from Mozilla Firefox

Clear Cookies from Mozilla Firefox

Clear Cookies from Mozilla Firefox should be the first task when you have to deal with the error. Corrupt cookies can lead your Firefox browser to such a situation. Use the following steps to get rid of the error.

  • Go to the three horizontal and parallel lines at the top-right corner of your browser’s webpage. This is the Menu button of the Firefox browser.
  • Click on the Menu button. Choose the Options menu from the drop-down menu.
  • Then, opt for Privacy and Security from the left pane of the window. Choose the box next to Firefox Will under the History section. Set it as Use Custom Settings For History.
  • Next, select the Show Cookies option. It will show in a dialog box.
  • Choose the Remove All option and quit the window.

Now, try launching any video on your Firefox browser and look out if the error appears again.

Fix 2: Clear Caches from Mozilla Firefox

Clear Caches from Mozilla Firefox

Besides the cookies of your browser, it is also necessary to clean up the caches of the browser. Otherwise, the browser can’t operate successfully. Use these simple steps to clear corrupted caches from the Mozilla Firefox browser.

  • Click on the Menu option of the Firefox browser. Next, opt for the Options menu as soon as the drop-down menu arrives.
  • Then you have to choose the Privacy and Security option.
  • Locate the option named Cached Web Content.
  • You have to click on the Clear Now button.

After the task completes, reload the browser. Open any video file and check if you can enjoy both the audio and the video on your Mozilla Firefox browser.

Fix 3: Install Media Feature Pack

Install Media Feature Pack

This fix applies to those Windows versions like Windows N or Windows KN. These Windows versions consist of all the basic applications but unfortunately, lack any Media Player. Windows N and KN users have to go through the easy guidelines cited below.

  • Go to the official website of Microsoft.
  • Search for the Media Feature Pack software on that website. The feature is available for N and KN versions of Windows 10 platform.
  • Download and install the feature pack.

Once the Media Feature Pack is installed on your Windows PC, now you can restart your computer. Launch the Mozilla Firefox browser and enjoy videos on the browser.

Fix 4: Update the Mozilla Firefox Browser

Update the Mozilla Firefox Browser

If the above fixes couldn’t work for you, you can try this easy hack. The outdated browser versions are incompatible with fully updated Windows versions. Track the guidelines listed below to update the browser.

  • Click the Menu button of the Mozilla Firefox webpage. Choose the Help option.
  • Next, opt for the About Firefox option.
  • Firefox now starts to check if any update is available. If it finds any update, it will download the update.

Once the download completes, you have to select the Restart To Update Firefox option. The problem should have vanished when you launch the Firefox browser again.

Fix 5: Disable Add-Ons on Mozilla Firefox

Disable Add-Ons on Mozilla Firefox

If you are still facing the ‘no video with supported format and MIME type found’ issue, then you have to use this fix. Extensions on your Firefox browser may get incompatible with the played video. Stick to the guidelines below to get over the issue.

  • Click the Menu button of Firefox. Choose the Add-ons option from the drop-down menu.
  • Make sure that you have chosen the Extension option from the left pane. You have to deactivate the add-ons that you had installed.
  • Try playing any video on Firefox after restarting the browser.

You can re-enable the extensions that don’t affect the video surfing on Mozilla Firefox.

Fix 6: Reinstall the Mozilla Firefox 

Reinstall the Mozilla Firefox 

If all these above-mentioned fixes didn’t relieve you from this situation, then you need to reinstall the Firefox browser. You can backup all the bookmarks and other data from the Mozilla Firefox browser. Then, continue with the following steps.

  • Launch a Run dialog box by pressing the Windows and R keys from the keyboard.
  • Fill the Open box under the Run dialog box with ‘appwiz.cpl’. Then click the Ok button to enter the Programs and Features window.
  • Locate the Mozilla Firefox option from the list. Right-click on it and opt for the Uninstall option.
  • Repeat step 3 for each and every Mozilla Firefox product. 
  • Reboot your computer and visit the official Mozilla Download website.
  • Download and install the browser again on your computer. 

Try to access any video on the Firefox browser. Hopefully, the error resolves now.

Fix 7: Try Another Browser

If none of the above fixes have helped you, still now, then you have only one choice left. You have to switch to another web browser for surfing videos online. There is no reason left to stick to the Mozilla Firefox browser if it is not working on your system.

Hopefully, the guide is helpful to deal with the no video with supported format and MIME type found error. 

Maria Colombo
Maria Colombo
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