Great extension. Only drawbacks: it doesn't seem to have any effect on Reddit, and for some reason it prevents the Cloudflare Captcha to succeed on deepl's login page.

Would be nice to have an editable white-list that allows regular expressions (or similar syntax). As an example, bandcamp has subdomains for each band and I'd like to disable it for the entire website, instead I have to disable autoplay for every new band I listen to.

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

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.

It works MOST of the time with YouTube. I usually have to reload the video page for it to kick in.

Since Firefox 66 released, Firefox can disable HTML5 autoplay by default on all platforms.

I'm using Firefox Nightly 67 64bt on my Windows 10 October 2018 laptop. And the add on does not work at all on YouTube and... any other sites.

It works but where's the source code you "licensed with X11"?

Add on is working great, however it would be better if the videos(particularly embedded youtube ones) don't buffer in background.

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

Works great!
Feature for deserving 5 stars: allow to edit/add whitelist items.
As of v2017-12-20 it has to be enabled for every bandcamp.com subdomain (anydj.bandcamp.com)

Could you please implement a fix for that?

Not perfect (had some glitches) but the only extension that I've found that actually offers a whitelist approach. I verified I can block on sites like CNN and can allow on sites like youtube & netflix. This should be built into browsers period and on by default. I can think of no good reason of ever wanting to allow this by default. So, good work.

Seems to work for me...it does break some websites--but so does the built-in FIrefox preference in about:config. This at least lets you whitelist sites that break...

Really this addon shouldn't be necessary--Mozilla should add click-to-play html5 video built-in, like they have for Flash...

doesn't always work on youtube

good