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.
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 ?
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.
FF with add-ons run noticeable slower than brave.