Force Flash Youtube video for Firefox 37+

There always has to be some crap that breaks my “comfy” zone when it comes to web browsing. Firefox 37 that was released not long ago extended the support for HTML5 video and Youtube kindly prefers HTML5 video over everything else.


If only Youtube in HTML5 mode wouldn’t suck so badly. Firstly, switching windowed and fullscreen mode messes up window placement, that “Press Esc key to exit video” popup is annoying as hell, video quality keeps jumping all over the place because Youtube High Definition extension doesn’t work anymore and video quality is absolutely pathetic. I don’t know why, but apparently my GPU does no video processing for any of the HTML5 video and it looks all blocky, smeared and rubbish. And for some moronic reason, it even taxes my laptop more than Adobe Flash video. Why, I don’t know. It just does and it’s pissing me off.

How to force Youtube to use Adobe Flash video in Firefox 37 and later?

Type about:config into the URL bar and press ENTER. Search for these two settings (use search field above) :


And set both to FALSE. This will disable H.264 and WebM support for HTML5. You can check if that’s the case here. It should look like this after tweaking:



Go to: Firefox Add-ons page -> Plugins sidemenu

Select “OpenH264 Video Codec provided by Cisco Systems Inc” and set it to “Always Inactive”.

This apparently forces Youtube to fallback to Adobe Flash and this is somewhat easier than the above method.

And if you want to control how Youtube videos are played and in what quality, I highly recommend Youtube High Definition add-on.

It’s stupid that I have to hack my browser again like this, but Youtube in HTML5 mode is absolutely rubbish. If they think this is how they’ll break us from the Adobe Flash chains, they are dead wrong. I’m staying with Adobe Flash mode until they make HTML5 mode equal in every aspect. And for F sake Google, fix/improve the quality mode settings already. It’s the same rubbish useless nonsense the day I found Youtube. Which is a very long time ago…

3 thoughts on “Force Flash Youtube video for Firefox 37+

  1. The subsequent time I learn a weblog, I hope that it doesnt disappoint me as much as this one. I mean, I know it was my choice to learn, but I really thought youd have one thing interesting to say. All I hear is a bunch of whining about something that you possibly can repair in case you werent too busy looking for attention.


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