- Popup blocking Block all those popup ads. To disable popup windows, select Advanced and then Scripts & Plugins from the Preferences window. Then uncheck the box that reads "Open unrequested windows". - Prevent scripts from doing various things You can prevent scripts from moving windows, closing them, changing the status bar and setting cookies. To change these settings, select Advanced and then Scripts & Plugins from the Preferences window. Then uncheck the desired boxes. - View Source View the syntax coloured source of a page, without having to view it in Notepad. --- Those are the features that are already in Internet Explorer. I didn't search all because there is way too many. Not too 101 right
first and second one is an option of sp2 last one is true, with mozilla you can see the source in COLOURED syntax, IE can only display notepad file.
Only 2.5% of my site seems to be getting hits from the FF browsers while the 90% is still from the IE. But I think FF will become much bigger.