I believe privacy is a fundamental human right, and I set up technology to help enforce my privacy on the internet. I use Firefox as my web browser because it's open source and not run by an advertising company. A web browser is a user agent, meaning it works for the user. Here are the settings I configure to help me be private on the web.
I suggest you maintain a user.js file in your Firefox profile directory to back up your settings, you can find every equivalent GUI setting by querying its name on searchfox.