Firefox mobile isn’t there yet. Passwords will conveniently autofill from your Google account thanks to the Android level implementation of password management, but more importantly it’s resource heavy and bad UI design. Ublock support is nice but some websites just don’t deal with it well. The nightly builds do fix my main problems with the UI but they crash all the time. So there’s hope for the future, but for now it’s not great unless you absolutely need proper browser level ad blocking rather than Blokada.