No Script: because it doesn't really matter if there's a hole in the newest JavaScript version for firebox. Link
Ad Block Plus: get rid of most nasty ads. Link
Cookie Monster: site cookies can store information on your browser about your preferences, but can also used to track you on the Internet. Link
DTA (Download Them All): I'm not a mass downloader but this Addon is a must with Unplug. Link
Firebug: a must have for web hacking. Link
Lazarus: after typing 10 times the same form, you end up installing this. Link
Skip Feedsportal: some RSS Feeds create a special formated url to keep a track of the sites you visit. If you don't want that, this Addon is for you. Link
Stylish: Check on my other posts to see what can you do with it. Link
Tabs on Bottom: as firefox user since version 1 I like the old style more than the new one. Link
Unplug: Extract media from web pages like Youtube. Link
User Agent Switcher: In some cases, if a web pages is acting weird, you can force them to believe you are using a different browser. Link
