Earlier quoted context omitted.
Despite there being no official releases in years and being abandoned by its official developers, Pentadactyl was kept afloat by its users, from whom you could still get fixes and releases through google code and google groups. I also fixed some things for myself, based on help from the community. Despite all this, it did finally completely break recently (before FF 57), and I just had to not update FF for a while un…
you are a tiny minority and a specialized browser fork is a great solution for your use case in this situation.
I just worry that people using some of these alternative browsers are opening themselves up to security issues since those code bases are less well-tested for security problems, and often they don't have the developer resources to implement things like process isolation and sandboxing.