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

Works as intended. Big thanks Afnan Khan.

Works fine on all sites which formely drove me crazy - like chip.de

Great! Can you please make an option to block only video looping (separately from autoplay and preload)!!!??? You would save millions of users from crazy ads! :) This should be a must!

Niech Cię Bóg (wybierz sobie który) błogosławi za to rozszerzenie :)

Stops annoying autoplay on Yahoo sites while none of the Firefox autoplay settings work (including Options, about:addons, about:config)

Finalement un moyen efficace de bloquer les vidéos sur yahoo qui se lancent toutes seules, que ni le réglages du module Flash, ni le passage en "false" du media.autoplay.enabled dans l'about:config de Firefox ne géraient...
Merci !

Works like a charm! Thanks

Add-on works, it stopped autoplay on iz.ru)

Works great with CBS News autoplay video.

Just installed it 30 minutes ago & it seems to be working well for me on Yahoo Finance.

I'm thrilled to say that, to date, this works exactly as described--including Youtube videos. What a relief. While it would be very nice to have a whitelist, I have not found it too distracting to have to click once to get a video started.

Marche très bien, very good ! Thanks you.

WORKS FINE in Firefox on my Win10 computer and in Firefox Beta on my LG Android phone. I don't know why people give it such a bad rating.