How to make firefox supports all the HTML5 technologies to run YouTube videos at full quality without real spasm

All people use YouTube to watch videos, even for a once-daily, of course, there are those who used YouTube to enjoy tapes of high quality and very high quality, so if you're a Firefox browser must be that you have encountered some problems in the operation of the qualities high for some tapes These are problems in cramping or in some cases non-functioning of the video, this problem is often caused by lack of support for other versions of the browser for some the HTML5 Technology which is causing some of these problems .. but in this post you will learn about ways to support this Technology that Firefox is still not supported by default in the last versions.

You can identify the elements that are not supported by your browser HTML5 via this link and you are sure you will find your browser supports H.264 techniques HTMLVideoElement and then while WebM VP8 does not support Media Source Extensions and MSE & H.264 then MSE & WebM VP9 
 

To make the browser supports these properties must follow these steps:

Run Media Source Extensions and MSE & WebM VP9

 

First we go to the settings page by enter this link about: config and then you search for media.mediasource.enabled then press it twice to become the box Valeu value of "true"
Now go back to the HTML5 link then you will find that it has been supporting Media Source Extensions and MSE & WebM VP9

Run MSE & H.264

 

As the previous step, enter a page about: config and then pressing the right mouse button and then choose New Boolean

  

After that we name preference media.mediasource.ignore_codecs then make its value "true" and so may be you run these elements.

While it may vary from version to version and there may be some problems but has worked the way with me very well, where you can watch all the videos at full quality through real HTML5 technology without the need for drivers flash by spasm browser.
Of course, if you are using Adobe Flash Player and actuation with you without spasm and well you do not need to run the HTML5.

I hope to succeed with you as I think the way that Firefox does not have to be that support these features by default in the next versions.