


To check the Media Source Extensions feature state, we can refer to YouTube's HTML5 test page.įrom the picture below, you can see that the browser does not have Media Source Extensions yet. To get it working, you need to enable the Media Source Extensions feature which is disabled by default. Instead of installing Flash, you can tweak the browser and make YouTube work for you without Flash.

Luckily for us, Firefox is an HTML5 compatible browser. RECOMMENDED: Click here to fix Windows issues and optimize system performanceīeing a Firefox user, you might face an issue that some videos do not play for you when you don't have Adobe Flash installed.
