Not only does FF Mobile support uBlock, I find it to be an excellent day-to-day mobile browser in its own right actually. Compatibility and performance gap vs mobile Chrome is much smaller than on the desktop for the sites I visit (or is even non-existent).
You can use newpipe (find it on f-droid) as an alternative to the youtube app. It has some other benefits too. It seems to block ads as a side-effect. You can also fix the stream quality. It has a few limitations too, but it's better than playing them in firefox, and even the youtube app for my use cases.
Just tried it out on my phone (android), and there's no notification tray widget to pause the audio?
Is this just not a default setting?
An add-on I can get?
Or just not something you can do?
So worst case scenario is:
1. Wake the screen.
2. Unlock phone.
3. reopen Firefox, because I've checked texts/email/social feed whatever after starting the music.
4. find the tab playing music.
5. Navigate to whatever in that tab controls the audio .
6. pause it.
vs. what I've come to expect from other apps (inc. Chrome, despite it pausing audio even when you swap tabs!) of getting a small widget in the notification drawer with at the very least a play/pause button I can hit after waking the screen.
I wonder how accidental that feature is. It's certainly not something that Firefox can advertise, since other apps which did that have been kicked out off the Play Store.
Also, I also found that feature to be not very reliable since Android 6, which quite aggressively puts background apps to sleep (at least on my phone with "only" 2GB of RAM). I find that any extensive use outside Firefox will make the background playing stop rather quickly.
