As you may imagine chromium is not my favourite browser. I feel it is difficult to customize and I hate its patronizing behaviour, for example showing the most visited websites in the startpage without giving the user a chance to put there what he wants.
So Opera is by far the best browser, but now dying (i.e. switching to the Blink rendering engine the Opera UI is heavily changing and loosing its mail integration).
FF/IW is an option (maybe seamonkey, which does not provide such a good mail integration as old Opera does).
my 2 cts