I have been using it ever since It's called Fennec and I can count on one hand how many times it has crashed.

Are you sure it's uBlock?

Been using Fennec for about a year with uBlock Origin, and I actually don't think it's ever crashed for me.

Yes, whenever I install it then it starts crashing almost immediately until I uninstall it.

I have been using Firefox + ublock for a long time, so there might be something else?

I don't know why you're downvoted. On a phone, the environment is more tightly defined/controlled and the error you saw is less likely to be unique to your configuration.

But in any case, you provided useful information. I've been an Android Firefox user for many years now - love it.