Use firefox (with as main addon noscript, ublock, dark reader and a cookie garbage collector). Sometime chromium when I am required to use some stuff that require the webkit engine (and changing user agent is not enought). Also, Tor when some site are blocked at my school.

I use firefox mainly due to it being open-source. Also, I owe a lot to Mozilla (I mean, they created the Rust programming language, my favorite one).