Rated 5 out of 5 stars

Perfect add-on. Two days ago, Youtube automatically switched my computer over to always playing Youtube videos in HTML5 when I'm using Firefox which made every video so choppy it was unusable. I've spent 2 days looking on so many forums, trying everything to fix the problem, and finally I came across this add-on and it has totally fixed the problem. Thanks v much

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

Very nice! Works as advertised. Install, refresh the YouTube page, and you're back on the Flash player.

Like many others, I've made the experience that the HTML5 player is terrible. Higher resolutions aren't available, the video and audio quality of the available streams is much poorer, they actually found a way to make it use more system resources than Flash (!), the controls are unresponsive, buffering is excessive, and on current versions of Firefox even the scaling is broken, so simple things like watching a video in fullscreen is impossible as well. I really don't understand how Google and Mozilla can roll out software this unfinished and broken.

I feel sorry for all the less technically-minded people, who have to deal with a completely broken YouTube, and won't find this fix for not knowing (or caring) about stuff like "Flash" and "HTML5".

This review is for a previous version of the add-on (1.2.1-signed). 

YouTube Flash Player 1.2 DOES WORK :) Rated 5 out of 5 stars

For me it simply works. The message saying "Your browser does not support any video formats available." does show for a second or two but then it disappears without need to reload anything and the video starts playing. I guess the extensions fixing video playback have to deal with changes that Youtube make to their source code as well as changes Mozilla makes to the browser. They want to go forward and leave the old Flash-based functionality behind. Unfortunately my crappy Intel Atom processor can't keep up so hopefully one of these extensions will always work for me. The other one is called "YouTube Flash Video Player", almost the same as this one. If this one doesn't work for you, try the other one.

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

The Sound Quality of HTML5 is shit, so this Add-on saves me from listening Music in bad Quality.
Thank you!

This review is for a previous version of the add-on (1.2.1-signed). 

life saver ! Rated 5 out of 5 stars

YouTube works fine now , you are a life saver

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

THANK YOU!
html5 is totally broken(using win 8.1 and firefox 37.0.2)
html5 sucks!

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

Thank god for this. The HTML5 player is entirely broken for me, so this is a life saver.
Now I can actually watch videos again. :)

This review is for a previous version of the add-on (1.2.1-signed). 

I wanted to upvote this thing so badly that I had to make an account here Rated 5 out of 5 stars

I don't have the fastest internet, so dealing with YouTube's constant indecisiveness between 144p and 1080p was such bullshit. All I want YouTube to do is stay at 360p where I can handle it.

But then this add-on decided to blow my mind. YouTube can change it's video quality anytime it wants during the video and this add-on won't skip a beat when that happens. Every video loads up unbelievably quickly, so... to me, it just seems like a must have for anyone struggling with YouTube's crappy video player.

I normally never write reviews, but this add-on was so amazing I just had to make an account in order to upvote this masterpiece.

This review is for a previous version of the add-on (1.2.1-signed). 

Thank you! But I think your review was for YouTube HD Plus right? You can find it here: https://addons.mozilla.org/addon/youtube-hd-plus

Rated 5 out of 5 stars

Suppose I want to revert back to HTML5 player, disabling this plugin isn't working. Any ideas? Thanks, otherwise great work

This review is for a previous version of the add-on (1.2.1-signed). 

When the add-on is disabled it doesn't interact with YouTube. If you are already on YouTube when you disable it, just refresh the page by pressing F5 on your keyboard.

Fixed AMD Video with YouTube Rated 5 out of 5 stars

Simple and lightweight addon, it fixed my specific use case of A: watching a lot of YouTube and B: using the Video Quality settings in the AMD drivers to sharpen and de-block video on the fly, as well as modify gamma for dark videos.

HTML5 supported hardware acceleration but not these enhancements, so I am very glad this worked. I hope it continues working as even though Flash has its issues, it is still important to me. I keep it otherwise disabled.

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

I can't thank you enough for this amazing add on.. totally worth it

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

Thanks to this addon you´re able to watch videos in a larger selection of resolutions as using html5 (especially when using firefox 33+). well done!!

This review is for a previous version of the add-on (1.2.1-signed). 

beste flash plyer die er is Rated 5 out of 5 stars

beste flash plyer die er is . ik heb een 5.1 zet op mijn pc en uit elke box komt een super geluid wat nog geen een flach plyer gelukt is dus nu blijf ik voortaan Leker op firevox muziek draaien dank u

This review is for a previous version of the add-on (1.2.1-signed). 

***** Rated 5 out of 5 stars

Just awesome. Not much to say, I really like this

This review is for a previous version of the add-on (1.2.1-signed). 

Amazing! Rated 5 out of 5 stars

I was fed up of YouTube having permanently enabled HTML5 for Firefox Developer Edition. This addon works perfect. Also those who like to force HD videos, please use Youtube HD Plus addon for perfect sync between these two addons. Thank you developer.

This review is for a previous version of the add-on (1.2.1-signed). 

Rated 5 out of 5 stars

It works. No need to restart your Firefox browser. Looks like more smoothly than HTML5 mode.

This review is for a previous version of the add-on (1.2.1-signed). 

Superb! Rated 5 out of 5 stars

Working as Required!

It even works on 36.0a1 with the new e10-tabs(64bit)!

This review is for a previous version of the add-on (1.0.1-signed).