Is it because there was at least one article that said it was something that had been compromised by the big scary evil government?

_{Please don't ask me to find it I have a bad habit of reading a lot of things and not making note of what I read to cite or pass on XD}

Or they just prefer something about their current browsers? Like I really tried to use Brave as my main browser for a while but there were too many tiny little ux things that annoyed me personally (I don't think they would be too much of an issue if at all for other people) so Firefox remains my main browser. I do however use Brave when I need to use a different browser for something (usually to be not logged in or for someone else to log in without me logging out) or when I'm doing online shopping or bookings and NoScript is just that little bit too good at its job and somehow managed to scrape together a bit of bat just from that.