Firefox can be made into so much more than just a browser via its huge extension base. Yes, this means you can replace some of your instant messenger, chat and microblogging needs by adding just a few extensions. Here are 18 tools that will let you turn your Firefox 3 browser into a communications portal.  
 
Whenever we discuss numerous Firefox add-ons, we like to remind you that we do not recommend you install ALL of them unless you like your browser slowing down.
Useful Tool
jsmersh: Looks like a useful tool to post to some of your social networking accounts.