Same, is there a fix for this?

Firefox media developer here.

It's a bit hard to understand what the problem is, sorry.

You can block video and sound auto-play altogether, or just audio, or none, in `about:preferences#privacy`, and choose or check exceptions you've granted, but if I read the grand-parent comment correctly, an appropriate setting has already been put in place.

Additionally, if the website really wants to play audio against a visitor's will, it can try to hijack clicks and touch events. There are some plans to tighten this, the spec was designed to allow implementing various policies. It should also be possible to write a content blocker for this as a Web Extension (maybe it already exists).

Does this happen on all websites? On some websites, that you could possibly share with us, so we can have a look and understand what's up ?

Can anybody that is not satisfied about this open a ticket at https://mzl.la/363s8KN, and put in `:padenot` in the box `Request information from` (log in with github or a bugzilla account) with some info about the websites ? An alternative would be to send me an email, username at mozilla.com.

Thank you, I have only noticed this occurring after clicking a different video first. It is probably due click highjacking or the like.

Thanks, I'll keep this in mind and report when I get it next time.

So far uBlock Origin seems to be pretty good at keeping the most annoying videos at bay, but sometimes they do slip through.

I also noticed it today on a website that video was autoplaying and was shocked by it as Firefox has stopped that for some time.

I'll note where it happens again.

I don't suppose you dismissed one of those "totally GDPR compliant" cookie bars right before that, did you? (You may have to think very hard; it's basically muscle memory for us these days...)

I've seen this trick in the wild. "No autoplay" means "no autoplay without some user interaction first". And clicking one of those "I accept" buttons is indistinguishable from clicking on any other random element to make it play a video. So they just made the "I accept" button play the video as well as dismiss whatever thing was probably covering up the website.

Some people are terrible.

You know what that could have been it, that would be one of those tricks.

Thanks for the tip.