I used Firefox Focus on my Pixel for a few weeks and was blown away by how fast it was. The mobile web went from borderline unusable to borderline pleasant with it, I imagine largely due to its tracking and limited ad blocking. Sadly, I migrated back to Chrome because anything that needs to work with Google login or opening an app simply doesn't work. This causes issues with a lot of things I use.
I feel like I'm being ActiveX'd into using Chrome now which is very non-Googly. Not sure how feasible it is to use a different mobile browser until Mozilla and Google work together to make sure they're all on the same API page on Android. Ironically enough, Windows is far more open and friendly to competing browsers than Android.