uBlock Origin at a minimum. But I would suggest a privacy focused browser. Librewolf, Mulvad or even Brave at a minimum. Browsers leak so much information about you it is easy for sites to fingerprint and track you even with an ad blocker.

privacytests.org

I know Librewolf is working on their DNS leakage (last section on privacytests.org), but they also allow you to select a privacy focused DNS server which is nice when you’re not on a network you own, so you can’t run PiHole.