My favorite Firefox extensions in a single pack, that contains:

• Add N Edit Cookies 0.2.1.0 
• Compact Library Extension Organizer (CLEO) 1.0 
• Domain Details 1.0.1 
• ErrorZilla Mod 0.1 
• Extension Manager Extended 2.5 
• Firefox Extension Backup Extension (FEBE) 3.0 
• Firefox Showcase 0.8.0 
• Gmail Manager 0.5.1 
• ListZilla 0.8 
• Session Manager 0.4.3 
• User Agent Switcher 0.6.9 
• View Source Chart 2.0.02 
• Web Developer 1.0.2

Favorzilla has been tested successfully with Firefox 1.5.x on Windows XP SP2 and on Mac OS X (PowerPC). ListZilla conflicts with MR Tech Local Install, that will be in the next version of Favorzilla.