I use:
VPN so constantly changing ip.
Tor browser for everyday browsing (has no script preinstalled). So onion provides double Vpn. Regularly closed down so history cleared.
Safari in private mode and lockdown mode for when tor won't work (tor ip blocked/hd video that is too slow to stream on tor). Safari Isolation in private mode is excellent, you can use two tabs with, say emails, and neither will know other is logged in.
Safari non private for sites I want available and in sync across devices.
Firefox in permanent private mode with ublock origin for when safari lockdown mode causes issues. (Bizarely Firefox containers doesn't work in private so no isolation across tabs).
Chromium for logged into Google stuff.
Chrome for web development.
Plus opt out for everything possible inc targeted ads.
I rarely see ads of anything I would want to buy, and VPN blocks most of it at its DNS.
Beyond that, anything else would be too much effort for me.
The advertising companies I'm sure know I am not susceptible to impulse buy on ads, I research and seek vfm so not really their target.