Things I like about firefox.
I think it is better at blocking pop ups.
It loads things faster and caches better that IE.
Things I don't really like.
I have a tendecy to randomly right click...this brings up that box and it doesn't go away most of the time due to the way I kind of drag the mouse around. I actually have to select and option on the menu just to make it disappear.
While 1.5 handles animated gifs better it is still far from great. When scrolling by huge pictures or even shlups sig it slows down the scroll and makes it kind of choppy.
Those are my big things. Tabbed browsing does not impress me. I have no problem keeping track of 15 windows on the task bar.
I can't wait till IE 7. That should be a nice big step forward considering we have been using 6 for the past 5 years.