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

Works very well for the most part, but like other reviewers are saying, it seems to not work for Youtube anymore.

Still works with other sites, but as of October 2018 it no longer is able to block YouTube.

Worked fine until October when youtube videos started autoplaying again.

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

Sadly It BREAKS with Vimeo even if disable autoplay and disable preloading are off by default. Please fix it. Otherwise very useful.

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.

Works well for what it does. Desperately needs a way to manually add domains though. For example, I can allow old.reddit.com and www.reddit.com, but video is still blocked because it comes from v.reddit.com…

Because you can't manually add a domain, even if you know what it is, you have to figure out a way to unembed the movie so you can play it as a standalone URL and *then* allow video to autoplay from it.

This adds is sock! Often sides use my CPU up to 100 percent. Its not in Windows, but also in Mac OS X

this breaks vimeo video playing.

Installing this extension into 163 mailboxes is a blank page. Prohibit expansion can be normal!

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.

I'm sure it worked before on Netflix (at some point) but after Netflix updates their site (which is quite often) this app no longer blocks autoplay content. I'm forced to remove this app and move on to something that works.

It works but it breaks Vimeo (black screen instead of video playing).

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.

It works, but stopped video cannot resume.

Works with YouTube perfectly as well as any other site using HTML5.

It works great! Finally I have a way to prevent youtube videos from automatically playing. A bunch of addons that specifically say that they'll stop youtube from autoplaying don't work at all. Thank you so much for this addon.

Edit: Idk why a bunch of other comments are so negative when all the other addons I've tried are the "piece of garbage" addons.