Breaks CNN video playback. Built-in autoplay off feature is sufficient. Removed plugin.

worked pretty well until it prevented www.spectrum.net page from loading. Cannot find an option to whitelist.

Works on some sites, but I can't get it to save the list of sites I want it disabled on. Removing this. Please update this add-on!

Doesn't seem to work in my case

Doesn't work on tumblr and causes huge ram leaks on know your meme.

This plugin works where the built in firefox html 5 blocker does not (no matter how I configure it) which would normally mean 5 stars.

However it also for some reason blocks web fonts. As a developer that is a big issue for me and as a developer I have no idea why this html5 blocker would prevent webfonts from loading.

Because it works well 5 stars because it breaks websites fonts -3 stars

Doesn't seem to allow manually adding domains. Having to visit every domain individually is a pain. Not for me.

The extension works inconsistently.

Doesn't work for me. It's a shame there is only one app to choose from. Opera/Chrome offer several.

This add-on only half works. It works for other sites that use HTML5 video but NOT YouTube.

NOT WORKING AFTER UPDATE.PLEASE FIX

It is (was) a nice app, but it does not work now.

Used to work fairly well. Now not at all as far as I can tell. Not even YouTube where the videos keeps on rolling.

Worked fine until October when youtube videos started autoplaying again.

Nefunguje na YouTube-Videá sa naďalej automaticky prehrávajú!Prosím o opravu...

Only works if I disable preload. I want it to preload I just do not want it to auto run. So it's partially broken and unusable for me.

On vimeo, this app prevented me from seeing or playing any videos. I like the idea, but I do need to see the videos to play them.

The white list doesn't work correctly. Doesn't block autoplay videos on NFL.com which was the whole reason I installed it.

Blocks videos successfully, but exceptions list does not work. HTML standards bodies need to come up with a real option for disabling autoplay instead of these half-baked, buggy solutions.

recently vimeo videos don't play with this addon enabled, even with selecting not to disable auto-play and preloading

per-URL config is wonderful (e.g.: disable-autoplay-everywhere-except-youtube)

EDIT: it stopped working completely for some reason