I misworded my original. I wanted to say, I'm considering moving off Firefox, but not to Chrome.
Any other browser recommendations?
Preferences > Privacy > Autoplay Settings... > set "Block Audio" to "Block Audio and Video"
Or alternatively about:config > media.autoplay.default > 5You open a page. A big box at the top has something it it. That something is video. The video loads. By the time you scroll down, it starts to play. Oh, and it jumps into a smaller box so you're Forced to observe it and click into it to stop it.
Media autoplay is not off.
Another way to phrase that is, the media autoplay is On.
The option described above Does Not Work. Another way to describe that is, it should not have video playing by itself.
Alas, video plays by itself. Apologies in advance for being terse and not explaining myself earlier.
In short, autoplay is On and the option says it's Off.
Please let me know if I can clarify any part of this.
I'll try disabling those.
But did you try scrolling the page? Sometimes those videos start playing when you scroll down and they become smaller and jump to the bottom right hand corner of the window.