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.