firefox focus does exactly what a mobile browser should, including blocking ads and trackers https://www.mozilla.org/en-US/firefox/focus/

it integrates really well with the full-featured Firefox mobile for times you want to use the history and bookmark and tab sync features. but yeah it blocks ads very effectively, it loads bloated news sites faster than any other browser I've tried, and it gets creepy spyware corporations like google off your back (slightly). it's good

@morganastra do these features help for speed? last time I used firefox mobile it was noticably slower than chrome or opera. I'd love to go back to firefox on my phone, but I found it just painful.