Today, Google launched an “origin trial” of Federated Learning of Cohorts (aka FLoC), its experimental new technology for targeting ads. A switch has silently been flipped in millions of instances of
privacy.resistFingerprinting deals with the screen size problem so don't maximize Firefox. Tor browser is better at handling this problem, if you maximize it'll create empty space to deal with it but it isn't really advised.
I'd recommend using Tor browser if you want some peace of mind. With Tor you are advised not to install any extensions or do any tweaking. Tor makes linux user appear as Windows users for example.
Check privacytoolsio's guide
privacy.resistFingerprinting deals with the screen size problem so don't maximize Firefox. Tor browser is better at handling this problem, if you maximize it'll create empty space to deal with it but it isn't really advised.
I'd recommend using Tor browser if you want some peace of mind. With Tor you are advised not to install any extensions or do any tweaking. Tor makes linux user appear as Windows users for example.