I tried Opera today (first time in a long while). It's extremely annoying in many ways, but Firefox is even MORE annoying in even MORE ways, nowadays. So I'm going to give Opera a try for a while.
It's really come a long way since last time I tried it. I still fondly remember the early days of Firefox aka Firebird aka Phoenix, and Opera always had tons more options and good stuff than Phoenix back then. Maybe I'll get used to Opera's mouse gestures again, who knows.