Chrome's general UI interaction is definitely more polished and snappier all around, but browsing mobile with good ad blocking, and not getting blasted in the face by stark white pages more than covers for Firefox's warts.
But I agree, uBlock Origin makes the mobile web far less painful. Also, I'll point out that you want to be using uBlock Origin, not uBlock. As I recall, Raymond Hill (the creator of uBlock) decided to hand over uBlock Firefox to one of the contributors to offload some of the maintenance burden but then the new owner immediately started trying to monetize it which prompted him to create uBlock Origin.
It might not happen in the near future, but chances are eventually you'll get to contribute something. And even if you don't, just accept uBO as a gift from a nice person.
One thing he (rightfully) points out is that the real power of ad-blocking solutions comes from the community-maintained blocking lists. In theory one could manually block every url they run across, but in practice we can use these tools (or a tool like pi-hole) almost effortlessly.
Isn't it what donation is ?
FF with add-ons run noticeable slower than brave.
On the other hand, the "Firefox Focus" app and Chrome do not seem to have this issue. Is there any way to fix this, because it's literally the only thing that stopping me.
But I think it's available for Asian countries only.