We will try various steps to solve this issue ranging from checking the video type to installing Adobe Flash. Before we move to the rest of the article, make sure that you sync your profile first as we will be resetting Mozilla. Also, log in using an administrator account. Make sure that you the latest version of Firefox installed on your computer beforehand.
What causes the error ‘No video with supported format and MIME type found’ in Firefox?
Since the introduction of HTML5, errors like these are common even in popular browsers like Mozilla. The reasons why this error message occurs when streaming any video are but not limited to:
Bad cookies and cache stored in Firefox. Each website fetches cookies and cache when loading content and if they are corrupt or bad, the browser will show errors like the one under discussion.Adobe Flash is not installed on your computer. To this date, there are still numerous websites who make use of Flash.If you have Windows KN and N Edition, the media-related technologies required by Firefox are not installed in them by default. This is how they differ from other Windows editions.There are plug-ins in the browser which may be corrupt or conflicting with the video playing mechanism.
Make sure that you export all your bookmarks and data before proceeding. When we follow the solutions below, your Firefox data might get erased.
Solution 1: Installing Adobe Flash Player
If you do not have Adobe Flash Player installed on your computer, it is recommended that you do right away. Like we mentioned before, there are still numerous websites who make use of Adobe Flash in streaming their videos. If you don’t have the software installed previously, follow the steps mentioned below.
Solution 2: Clearing Cache and Cookies
There were several users who reported that the cache and cookies were causing issues for them. For example, they can watch the video in Private mode but were not able to do in the normal one. Here we will attempt at clearing your cache and cookies from the browser. This will log you out of all websites and may even forget remembered passwords. Hence export all your bookmarks and data before following this solution.
Solution 3: Installing Media Feature Pack (for Windows N/KN)
Windows N are versions of the operating system which contain all the base features of Windows but do not have any media player capabilities. People may install this feature but later on, forget that the Media Feature Pack is not built in. To install the Medea Feature pack, navigate to Microsoft’s official website for installing Media Feature Pack for N and KN versions of Windows 10 and download the executables to an accessible location. Install these and restart your computer. Then follow Solution 1 again to install Flash and restart again. Now try accessing the website and see if the error message is resolved.
Solution 4: Reinstalling Firefox
If all the above solutions don’t work, you can attempt at reinstalling Firefox from scratch. Hence make sure that all your bookmarks and data is safely backup in your Mozilla account so we can import them later on.
Solution 5: Using another browser
If you fail in every way when trying to stream a video, you can make use of other popular browsers out there such as Chrome. Chrome uses the Chromium web engine which is totally different as compared to Firefox with respect to encoding, media capabilities etc. There were numerous cases where users were able to stream videos on Chrome as compared to Firefox. Navigate to Chrome download website and save the executable to an accessible location. Now install Chrome and try accessing the website video in it. Hopefully, there will not be any issue. If the video is inaccessible on several browsers and other devices as well, it probably means that there is something wrong at the server side. Here you can lodge a complaint with the website owner and wait until it gets fixed.
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