I've been using Firefox before it even was version 1.x, and I still am. There was a certain time when multithreading became increasingly important, and Firefox took quite long to adapt (I think around 2012...2014). But it has. It is quick, reliable, it can be extended the way I want, and I can really only recommend it to others as the better alternative. Even Mac users (I use it there, too) should think of it as the better alternative to Safari, which is nowadays called "the IE of Apple".
I personally also cannot trust a browser that is made by an ad and search giant. That is too many interests put into one place.
I donate to Mozilla on a regular basis. You don't need to do this, but you should really try out Firefox - maybe even again, if you dropped it some time ago.
