Nobody can say what is the "best" browser, in the same way nobody can say what is the best car, the best football player, the best restaurant.
IE is the most common, only because Microsoft give it away free with Windows.
Of the others Firefox seems to get the best "press".
I suppose it could be said a browser is a browser is a browser as they all show the same web page.
What may make a particular one stand out is the add-ons, and Firefox again seems to have a lot.
Why not try a few - Firefox, Google Chrome, Opera.
They are all free, and you can have as many browsers installed on your machien as you like.