I went on amiunique.com, and it says that I’m unique.
Lowest scores: list of fonts JS (0.01%), canvas (0.00%), media devices (0.00%), user agent (0.11%), and audio data (0.80%)
I use Linux Mint Debian edition, Librewolf browser, and Mullvad VPN. How do I become less unique?
Easiest answer would be: Use a common OS, with a common browser, and no add-ons.
The moment you start using something different to Windows, Android, iOS or macOS with Safari, Chrome or Firefox, you’re probably already in the 5 % (just my uninformed estimate). Add-ons also increase this value drastically.
Long story short: The sad truth is, the moment you’re interested in online-prviacy, you’re very unique.
Is there no way to spoof that I’m using one of those without actually using them?
Go with Brave. They add stuff to your fingerprint, so that is is completely irrelevant!