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uBlock Origin at a minimum. But I would suggest a privacy focused browser. Librewolf, Mulvad or even Brave. Browsers leak so much information about you it is easy for sites to fingerprint and track you even with an ad blocker.
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.
I booted a VM with BeOS for nostalgia a couple months ago. Remember booting that as a kid and drooling over how fast it was.