Not on 36 it doesn't Rated 1 out of 5 stars

Doesn't work on current Firefox 36. I hear the audio playing and the video seems to be streaming, but invisible. Clicking restores video without delay, reinforcing the feeling the video was playing anyway and was hidden.

doesn't work Rated 1 out of 5 stars

installed but videos still play HTML5, can't disable at https://www.youtube.com/html5

okay, but... Rated 3 out of 5 stars

Does what it says it does, but as it says, it only works on YouTube. Since YouTube uses Flash by default (and you should unquestionably have Flashblock already installed), where it's really needed is on other sites that use html5 videos only, like theonion.com. Given how annoying autoplay videos are, it's hard to believe there isn't a more functional one out there already, but this seems like the only one?

Rated 4 out of 5 stars

Does what it's supposed to do and does it well!
Only problem is with playlists, it plays even when "blocked" element is showing.

Is this a bug? Rated 5 out of 5 stars

It stops the video playback, but the sound is "loading" underneath (consumes Internet traffic).

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

Rated 5 out of 5 stars

Thank's so much amazing and so simple, exactly what I was looking for!

Rated 4 out of 5 stars

Thank you :) Would be nice if it could cache while paused.

Very Useful Rated 5 out of 5 stars

Works with Yahoo html5 as well. Thanks!

Multi-tab youtubing possible again! Rated 5 out of 5 stars

Great add-on. Thank you! Works fine.

I wonder why Youtube/Google makes this necessary at all. They could easily set the video status to "paused" when you load a page. So you could start playing it with one click.

In the past I used FlashBlock instead but Youtube has changed something to make it incompatible...

Rated 1 out of 5 stars

won't work at all

does not work at all Rated 1 out of 5 stars

I have the latest Addon 0.2.1 - but sorry it dont work at all. Sorry for only 1 star

Rated 5 out of 5 stars

Thanks, it works!I tried with "YouTube ALL HTML5" (http://addons.mozilla.org/firefox/addon/youtube-all-html5/) addon to get youtube into HTML5 mode - so it works even without an account.

Thank you for review and reporting compatibility with other addon

Rated 1 out of 5 stars

I need this to block auto play AND block buffering. Unfortunately it doesn't always work. you must update it frequently base on users comment. not only making an add on and leave it without updating !!!

This user has 2 previous reviews of this add-on.

If you NEED something to work, you should, at the very least, be polite to ask for it. This is review system, not defect reporting system. If anyone is reporting errors here, they are doing it the wrong way.

FYI, I build this extension out of my free time. If anyone reports an error, I have asked them the details but no-one ever replies. If anyone thinks that there is any problem, they should be able to write down steps to reproduce it. If it does not reproduce and I am only left with words like "does not work sometimes", then I am sorry, but that problem won't be fixed.

Excellent addon! Rated 5 out of 5 stars

I hit a website today that tried to play 7 videos at once! It pissed me off so I went looking for a solution. I installed this, changed my YouTube settings to html5 and then hit that same site again to test it. It worked. Fantastic.

Note: go here and opt in...https://www.youtube.com/html5

When you are done, here is a test site...

http://www.alipac.us/f9/collection-overpasses-impeach-obama-videos-pictures-news-reports-alipac-285046/index2.html

If the videos don't auto-play, you got it right.

rusober Rated 1 out of 5 stars

An unreliable Add-on.

Seriously. You took all that effort to put 3 words only? how is that gonna reliable for me or any other user?

Doesn't always work Rated 3 out of 5 stars

I need this to block autoplay AND block buffering. Unfortunately it doesn't always work. In fact I'm not sure if it works at all.

Rated 4 out of 5 stars

Thanks, stops autoplaying at least, now it would be nice if you could find a way to load the video but guarantee it starts paused so that the video won't play but will be buffered.

Good! Rated 5 out of 5 stars

Nice! But it's don't prevent video to start. It's just stop it almost immediately after start and stop downloading.

Rated 5 out of 5 stars

Sorry about my post below, I was wrong. The problem is rather that after I click on the play button of the addon, it does nothing, but maybe that's becouse some incompatibilities with other addons I use...

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

Rated 5 out of 5 stars

Upgraded to the HTML trial on YT, only to learn my stop-autoplay didn't work.

Google sent me here, and five seconds later, the problem was fully resolved!

A must-have!