I've been using Firefox mobile for years and really love it. It's always been a vastly better experience than Chrome. I usually use DNS based adblockers on my phone though; AdAway+rooting via magisk.
Without rooting, you can use the VPN blocking provided by AdGuard. It has some paid features (like ad blocking in apps), which it sometimes reminds about, but otherwise I am happy to use both Chrome and Firefox for Android without advertisements.
Gesture tab switching (swiping on the top bar) is the killer feature for me. I use Firefox but with great sacrifice, because swiping is so ingrained in my workflow.
