Is that something you're worried about? The link says there would need to be both a browser exploit and a system exploit on top of that to get out of the sandbox, which seems pretty unlikely to happen when running uBlock on a mobile browser.

It seems like one of those things where it's not as secure but it really doesn't matter in reality.

People like this aren't usually rational, they've just snapped for whatever reason and are doing whatever makes sense in their own head at the time.

Sounds like maybe a faulty battery failing early, it should be under warranty I'd imagine if it has only been a few months?

You're not going to find an alternative that everyone has, because only Quick Share is included by default on Android devices.

The battery health indicator could be wrong, does it still run as long as it used to?

Pretty sure this is a straight up scam, the RAM changes depending on which site you find it on with none of them showing 20GB of actual RAM, and the website for 'doogee' doesn't work

I'd take a guess that from their perspective, putting that time + money into developing and supporting a Linux version isn't worth it when probably ~3% of the user base is using it.

Outgoing should already allow everything, so no need to specifically allow it.

Make sure you're creating a block rule specifically on outgoing in that case.

Is wireguard incoming or outgoing from the machine you're trying to block it on?

Do you have something listening on port 52038 that will respond to a port scan? If not it will report as closed.

Librewolf (Firefox fork with better privacy) + uBlock Origin (comes pre-installed) + "AdGuard – Cookie Notices" filter enabled, plus any of the others you like.

Then bask in the internet without any annoyances, popups, or ads.