I've been using Opera since version 6.x and even then it was the best and fastest browser and it still is. Firefox is nothing compared to Opera and I don't see what all the hype is about . Firefox introduces some "new" features and people are awestruck while those features have been in Opera for many months! Any Firefox use reading this try Opera. You won't go back to Firefox.

This best feature is where no popups can hide the address bar, thus showing you the actual source URL, even for secure sites.

JavaScipt options allow you to always show address bar for popups - You know the exact URL of that popup, even for secure sites.

Tools> Preferences>Advanced>Content>JavaScipt Options
Uncheck "Allow script to hide address".

If don't want new windows stealing focus then Uncheck "Allow rasing of windows"

Opera not being No. 1 despite its being nearly complete out of the box, is an example why people still choose IE or FF. It just shows most people are indeed sheep!

This browser is also nice, its fairly easy to use. Page loading times are pretty good. The features are nice.