
Bad cookies and cache stored in Firefox.The reasons why this error message occurs when streaming any video are but not limited to: Since the introduction of HTML5, errors like these are common even in popular browsers like Mozilla. What causes the error ‘No video with supported format and MIME type found’ in Firefox? Make sure that you the latest version of Firefox installed on your computer beforehand. Also, log in using an administrator account. Before we move to the rest of the article, make sure that you sync your profile first as we will be resetting Mozilla.

We will try various steps to solve this issue ranging from checking the video type to installing Adobe Flash. No video with supported format and MIME type found – Mozilla Firefox


Recently, Mozilla has followed the trend and removed all plug-ins from the browser in favor of HTML5 with the exception of Adobe Flash which is still widely used and popular. This video can range from Facebook to other platforms such as LiveGo. Users experience the error ‘ No video with supported format and MIME type found’ when they try to stream video content on their Firefox browsers.
