Doesn't Opera come with built-in advertisments(?).... that would be distracting..
Anyhow, I think all the non-IE browser (Opera, Safari, Netscape) are based on the original Mozilla codebase so they *should* display pages the same way... correct me if I'm wrong.
FireFox/Mozilla also has a big repository of
free extensions so you can add whatever browser features you want... I just added Mouse Gestures, ad-blocking, flash-ad blocking, and the Googlebar... quite nice.
|rasta|