Tor is, of course, the highest possible form of ananymity. However, it has some (serious) limitations. With Firefox and a few settings and add-ins, I find it also works. Of course, this is mainly aimed at ad networks and inquisitive big American corporations.
Therefore, what I do:
Settings in Firefox:
Settings -> Privacy & Security ->
1.) Improved protection against activity tracking -> Strictly
2.) HTTPS only mode -> Enable HTTPS only mode in all windows.
3.) Enable secure DNS with -> Minimal protection.
2.) Firefox Multi-Account Containers
4.) Temporary Containers
5.) uBlock Origin
Since it is no longer necessary through the cookie jars (Multi-Account Containers) nor additionally:
6.) I don't care about cookies
All settings in Firefox described above I translated from german. Maybe the settings have a different name for you.
If you need help setting it up, please ask @Laura for my email address.
By the way, HTTPS only mode is required for Tor. Otherwise all Tor nodes can read everything you look at.