Performance is not good at all. I have a 120hz phone now and scrolling feels like Firefox is still on 60hz. Settings and the like are perfectly smooth tho, so it’s not actually only rendering at 60hz, it’s just rendering webpages so slowly that it can’t keep up with my screens refresh rate.
Feature-wise Firefox is way better than Chrome on mobile but performance is just horrible. Firefox also looks a little dated on mobile by now, especially compared to Chrome but that’s not a deal breaker. Would be nice if they adopted Material Design 3 tho.