Simply, functionally - The Best! Thanks!

I appreciate the effort that it takes to write plugins so no hating here, just comment on why this wasn't a solution for me. Firstly, as others have said, it takes a while to kick in. It plays a few seconds of the video before it is stopped. This is annoying (mostly for my neighbors). Secondly, the stopping pre-load feature effectively means that one has to click twice to start the video, once to stop pre-load and once to start the video. I used the suggestion that itge13 made in one of the comments (the simple change to the config file) and it works well, so I uninstalled this plugin. It needs a bit more work but on the other hand, the about:config method is quick, easy and works (in Firefox at least) so I see no point in further development.

It's a piece of sh*t. It doesn't work at all.

Works perfectly with a few other tweaks!

When I first installed this add-on, it worked perfectly. I recently uninstalled it when YouTube updated it's platform.

This is how I got it to work again and how I stopped YouTube videos from preloading, AT ALL.

1. Get this other add-on YouTube Design Preserver 2.2.0 https://github.com/GuyXY/YouTube-Design-Preserver. Set it to 'Old Layout'

2. In your web browser, go to About:Config. Scroll down to and double click media.autoplay.enabled. This will change the value from 'True' to 'False'. No media on any site is allowed to start playing automatically.

Very useful for quick tab-switching, thank you! :D

работает

It's working for me....

Somehow works - but always lets the video play for a couple seconds, then reloads the page and then disables the video on the reloaded page...

Perfeito.

Does not work. FF 54 32-bit, Linux Mint, Cinnamon desktop. Autoplay always on, has to be manually turned off thus making this add-on useless.

Not working.