Waterfox browser, Privacy Badger, Port Authority. Usually private tabs, always-on VPN with Quad9 DNS.

It rarely breaks sites, but occasionally captcha doesn't work. That's a privacy Badger thing that you can disable temporarily or for the site entirely.

Then I test with https://coveryourtracks.eff.org/ and might tweak additional WF settings.

I also use Lineage OS, F-Droid only, no Google anything or any big tech. The "biggest" tech company might be Proton. But I like their mail service with custom domain support and SimpleLogin aliases.