Prevents Twitter videos from looping when they reach the end, which is what I wanted it to do. Also prevents IMDb videos from playing at all. And I suspect this extension might be somewhat CPU-heavy when simultaneously acting on multiple tabs, too.

Don't work on morgenpost.de
funktioniert nicht auf morgenpost.de

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!

Excellent add-on. Firefox's autoplay settings don't seem to have any effect on many websites; this one does the trick. Thank you for making it.

It did not disable autoplay on Tubi. Nothing else has stopped autoplay on Tubi without breaking manual playback.

Does not disable autoplay, nor preloading.

Doesn't seem to work in my case

This is a blessing! As a person with ADD this really helps me stay focused. This works for websites where Firefox by default doesn't offer disabling autoplay.

Addon not bad, but would like to exclude some domains. Unfortunately it does not work. Must switch it off manually, if needed. It sucks.

Works fine, BUT, can't figure out how to set Per-Domain Preferences. Want it enabled for YT but disabled for everything else.

You had ONE JOB...

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

It doesn't bloody work!

BREAKS VIDEO on some sites .. espesially IMDB
I dont advise anyone to install this addon unless it gets a major update

Diese App blockiert unter Firefox in GMAIL beim Schreiben von Mails das Drop-down-Menü der vorhandenen Kontakte/Gruppen. Man kann Kontakte nur mehr einzeln, händisch eintippen. Aus diesen Gründen ist das Add-on unbrauchbar.

this should be build into browsers from the start!
But meanwhile, we have this neat thing.

Whomever gave 1 star and is saying to use Video Autoplay Blocker is probably the author of that garbage add-on. It does not work at all.

THIS ADDON WORKS PERFECTLY

Please fix this to work with JW player.

Would have a 5★ review if it were not for making JW Player crash out — and JW Player is the most common embedded player, claimed to be on 2 million websites. This IS fixable because as another reviewer pointed out, the rival "Video Autoplay Blocker" addon works fine with these sites — the only reason I'm not using that addon is because it often leaves its "play" button at random positions on the site I'm viewing.

Does what it says. If you want to preload videos/thumbnails, you can by hovering the mouse enough times or clicking and releasing (to activate the media). The only problem I saw is that in some websites, like reddit, don't play videos with the extension on -- they don't work. But this is very minimal.

Works but errors videos... try 'Video Autoplay Blocker' addon. It works good in my testing so far.

It puts a 'Play Video' in top corner.. WORKS GREAT and I checked the code with 'Extension Source Viewer' and it is clean, no spyware in it. 5 STARS!