ICYMI in my feed yesterday Mozilla Firefox has browser anti-fingerprinting built in, it’s just not enabled by default.
Browser fingerprinting is when 3rd parties use your computer’s characteristics such as which fonts you have installed, your type and number of CPUs, etc. to uniquely identify you to advertisers or other even less friendly sorts.
In Firefox type in About:config, click the warning then type in the search window: resist
Set
privacy.resistFingerprinting
to True.