Firefox with like 10 different settings checkboxes unticked through its settings to disable phoning home, prevent sponsored suggestions, prevent recommendations, etc. + ublock origin extension installed, obviously.
It used to be just an install and go ordeal. Now you have to have all these caveats. I used to send technical and interaction to Mozilla but given their terms changes I can’t be confident in them with even that much information anymore.
Final thought is I don’t see what Mozilla’s endgame is. It costs a lot of money to develop a competitive and impactful web browser, I understand that much. Where are they supposed to get their money from? Well. I don’t get paid millions a year to solve this problem, but it seems pretty obvious the current leadership have made their minds up to make Firefox yet another advertisement browser.