Well, if you want more info you can always ask the hyperbola devs more about
it, particularly, emulatorman.
By the way, Waterfox has some issues now, but yeah,
Brave on the other hand, has many more... I wouldn't trust A: Brave, and B:
anything based off of chromium... Even Iridium the fully free version...
unless they somehow can support firefox addons...
Noscript really does make huge waves for firefox in the way of
security/privacy.
ps, the linux libre lts kernel itself is hardened for hyperbola by default.