Opera over Firefox

A commenter asked why I went back to Opera. What I like in Opera (in random order) are:

(1) the "close window" X in each tab
(2) the way the password manager works
(3) the way the form filler works (this is a biggie)
(4) I can place a new bookmark more easily
(5) search on bookmarks shows where the result is found (I have quite a hierarchy of bookmarks :-))

BUT I'm going to try NS 8.x for a while (since it's based on FF) and see if it has overcome those deficiencies.