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Author Topic: Some Firefox users canít watch 4K videos on YouTube  (Read 2186 times)


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  • Kitizen
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Some Firefox users canít watch 4K videos on YouTube
« on: April 01, 2018, 02:07:41 PM »

Ultra-high-definition content has been gaining prominence these past couple of years, with Netflix, YouTube and many other video services bolstering their content to include 4K resolution. Unfortunately, some Firefox users arenít getting this option, with the browser capping them at 1080p and in rarer occasions 1440p.

While the issue was brought up by KitGuruís senior editor Leo Waldock, one of the first notes regarding the problem can be traced to 2015 on Mozillaís own support page. True enough, YouTubeís increasingly popular 4K option could not be found when using Firefox, but appeared for the very same videos when utilising a rival browser.

Firstly, users are instructed to open a new tab and place about:config in the address bar. A warning message appears after clicking enter, explaining that changing settings can be harmful but the process is simple enough to click ďI accept the risk!Ē without worry. Next, type media into the search bar (not the address bar) and navigate to media.mediasource.webm.enabled. Double click or right click this option to ensure that it is enabled.

This was broke for me when I checked. I enabled the setting they mention and now its working again.
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  • Kitizen
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Re: Some Firefox users canít watch 4K videos on YouTube
« Reply #1 on: April 01, 2018, 07:44:55 PM »

Thanks for that. Mine was set to false and I have been having problems with video on FF so will give it a go.
Tim & freenetname
Asus RT-AC68U and ZyXEL VMG1312-B10A Bridge on 80 Meg TTB Fibre