Impossible to use, considering the addon toolbar hasn’t existed in years. Rated 1 out of 5 stars

Not much else to say. Can’t actually use the addon.

Rated 2 out of 5 stars

It used to work (FF29) but seems not to work anymore (FF33) also with toolbars enabled

Marketing Tool, no Youtube Addon Rated 1 out of 5 stars

http://prntscr.com/43ofj2

As you can see on the screenshot, I opened the settings and all settings it has, is a "Marketing" Checkbox which is activated at the start. There is no Toolbutton as it is explained and no where else. Also it was updated today, so no excuses possible.

amy, what about 144p, that is lower res than your lowest Rated 1 out of 5 stars

would love to see an addon that would AUTOMATICALLY AND ALWAYS play videos at the absolute lowest res available, without having to click the icon to 144p even with your addon running.

This user has a previous review of this add-on.

Rated 1 out of 5 stars

This addon will Destroy Your Firefox Profile, and firefox will not start. Stay away from it!

instuction link broken Rated 1 out of 5 stars

This link for instructions on how to use your add-on brings up no more than a blank page:
http://www.grizzlyape.com/addons/youtube-autoplay-stopper/instructions/

Video start so fast now ! AMAZING Rated 5 out of 5 stars

The moment i click a video in Youtube it allready starts !
it runs so fast and smooth ! just amazing

HI EVERYBODY GET THIS ADD-ON IT IS AMAZING
thanks and cheers , great work

This user has a previous review of this add-on.

Great if you find yourself clicking that resolution button in every video Rated 5 out of 5 stars

It does still work, now it just takes a while because of how Youtube handles definition changes. This is a must have. People who claim this to be malware are paranoid and/or have already real viruses on their computers.

Was GREAT...but doesn't work anymore. :-{ Rated 5 out of 5 stars

This was a time saving addon until it stopped working after updating Firefox to version 21.0. It might be YouTube's fault, don't really know.

Absolutely required Rated 5 out of 5 stars

I can't believe YouTube doesn't do this automatically. I have broadband and always want to watch 720p video.

Update ? Rated 4 out of 5 stars

When new update ?

It is not working Rated 1 out of 5 stars

I was activated addon bar and i was choice 240p quality. But everytime, i'm changing video quality on youtube (on video). Because it is not working. All videos are opening 360p everytime, but program setting is 240p. So, it is not working. Thanks.

Rated 5 out of 5 stars

Simple and does exactly what it should.
I don't get why people think something is a malware when it does not work it should

flashblock compatible? Rated 4 out of 5 stars

Is it possible that you make it compatible with "flashblock"?
At this moment it doesn't work with it
5 stars if you get that fixed.4 stars otherwise

Good Rated 5 out of 5 stars

Thanks

MALWARE. DO NOT DOWNLOAD. Rated 1 out of 5 stars

DO NOT DOWNLOAD. This add-on crashed Firefox
repeatedly. Have managed to finally remove but still
having problems. My internet usage jumped up as soon as I installed this crap. Sponsor supported, yeah right, more like malware.

Probable Malware! Beware! Rated 1 out of 5 stars

This extension is "sponsor supported" which immediately should bring up some warning signs. Had this extension together with the dictionary extension, those two alone, and after a few months it started to block access to mozilla.com, avg.com and several other sites. In addition I noticed an attempt to change legitimate ads with different ones from a shady source. I noticed that my computer tried to visit a site called IICM.com or something similar, but my host file caught it as advertising/malware and looped it back to local host. The extension also changed my About:Config settings, but resetting the associated settings for this "extension" or malware delivery system lifted restrictions to mentioned sites and stopped the attempts to access the shady site. Firefox is way faster with this extension deleted and configs restored. Don't download and for god's sake don't rate it five stars before you have tried it. Never would have downloaded this computer breaking crap if it weren't so decently rated. Get it together!

Press Ctrl+/ Rated 4 out of 5 stars

Great Addon. Not sure what "enable marking" does but it works without it enabled.
Also it's working fine on https for me. Make sure you have add on bars enabled by pressing ctrl+/ or going options. If that doesn't work check your toolbar layout.

no hmtl5 support Rated 3 out of 5 stars

HMTL5 is the way of the future and even after a year of it being on youtube it looks like this wont support it

Nice Rated 4 out of 5 stars

Just what I need. It's simple and unintrusive and works fine. UI could use a little work and sometimes it takes way too long to change the quality. I mean that browser starts to load wrong quality for while before the page updates.