If I'm not mistaken Firefox's tracker blocker on strict and uBlock Origin do the same job
Around 2014 I had hacker phase so I've installed BackTrack(Kali Linux), ofcourse I didn't knew a thing about Linux but hey it was a start :D
Since then I had dual boot with Windows until 2020 when Ubuntu 20.04 dropped and Windows never touched my computers again.
I think it's great that such a large content creator like PewDiePie made a video about Linux
Well yes, anyone can compile its own version of Signal and use it and it will work as long as there aren't some major changes to its communication protocol
I've also tried to use Mullvad as regular browser but even though I turn off always private mode, after restart all cookie exceptions disappear
Even though I don't use chromium-based web browsers because of its monopoly, it would be nice if we could integrate brave shields into ungoogled chromium so people wouldn't have to deal with all bloat and surprises from Brave