Firefox Nightly allows the use of many Desktop addons. Kiwix Browser, based on Chromium Mobile does the same. Not all Addons work perfectly, but at least there are some like
- Noscript
- LibRedirect (.crx)
If you implement these features, maybe its okay without support. Because I have to say, the browsers are awesome at implementing all the 3rd Party extensions Firefox would need.
Still, Kiwix has some experimental support which works fine. Its just not a privacy browser, and I would like to have Brave mobile, to sync my Passwords e.g.