I've mostly been using the chromium-based Brave Browser which is Chrome without the advertising engine plus a built-in adblocker. Requires going through the settings once to enable that. There's a very decent android-only browser that does much the same, called Bromite. (Brave has a mobile version but Bromite is developed from scratch for Android, and is stable & supported).
I hope this helps someone.
I run my own DNS so can easily see attempts to phone home, and serve ads. I get less of both those things than I used to get with Firefox and its 'Sync' routine. I feel more secure with Brave Browser than I do with Firefox but I have no axes to grind and am perfectly happy using Firefox onsite when it is called for. Little performance differences. Marginally, Brave is better.