Mozilla Firefox is a free and open source web browser. It also provide the most control to users in regards to privacy and security. Someone published a comprehensive list of Firefox privacy and security settings on github:
From the page:
You could also add the add-ons: uMatrix (can replace Privacy Badger, for advanced users and much more effective), Multi-Account Containers (to separate website connections), Cookie AutoDelete (it supports rules according to containers). I use also NoScript (without JavaScript blocking) to disable WebGL, and for its protection features: against XSS and ClearClick, but it’s a bit buggy in 56 and not yet available fully as web extension. If you use Google you have Google search link fix but it’s minor