This is what I use:
- Adblock Plus 1.1.1
http://adblockplus.org/
Ads were yesterday!
- AI Roboform Toolbar for Firefox 6.9.96
http://www.roboform.com
Allows the use of Roboform in Firefox.
- CBNotify 1.2
http://www.cbnotify.com
Displays Clickbank daily sales in the status bar.
- ColorZilla 2.0.2
http://www.colorzilla.com/
Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies
- Converter 0.9.3
http://converter.mozdev.org/
Contextual unit, timezone, and currency converter.
- Download Statusbar 0.9.6.5
http://downloadstatusbar.mozdev.org/
View and manage downloads from a tidy statusbar
- Extension List Dumper 1.14.4
http://sogame.awardspace.com/
Dumps a list of the installed extensions.
- FastestFox 3.0.4
http://smarterfox.com/
View "related articles" box on Wikipedia, search selected text from popup bubble and context menu, search from the Awesomebar, easily switch search engines for a search, and visit bookmarks with keyboard shortcuts!
- Flashblock 1.5.11.2
http://flashblock.mozdev.org/
Replaces Flash objects with a button you can click to view them.
- Google Gears 0.5.33.0
http://gears.google.com/
These are the gears that power the tubes!

- Greasemonkey 0.8.20091209.4
http://www.greasespot.net/
A User Script Manager for Firefox
- IDM CC 6.7
http://www.internetdownloadmanager.com
Internet Download Manager integration module for Mozilla
- IE Tab 1.5.20090525
https://addons.mozilla.org/firefox/addon/1419
Enables you to use the embedded IE engine within Mozilla/Firefox.
- Java Console 6.0.12
- Java Console 6.0.10
- Java Console 6.0.13
- Java Quick Starter 1.0
- Live HTTP headers 0.15
View HTTP headers of a page and while browsing.
- NBA Scoreboard 2010 3.10.1
http://www.nbascoreboard.net
Get today's scores and news from the NBA.
- PDFescape Extension 0.13
http://www.pdfescape.com
Enables PDF files and forms to be opened and edited in PDFescape, free.
- QuickDrag 2.0.2.1
http://code.kliu.org/quickdrag/
Extends the function of the drag-and-drop mouse gesture so that it can be used to load URLs, do a web search of selected text on a page, or save an image on a page.
- ScrapBook 1.3.6
http://amb.vis.ne.jp/mozilla/scrapbook/
Helps you to save Web pages and organize the collection.
- SearchStatus 1.33
http://www.quirk.biz/searchstatus/
Display the Google, Alexa, Compete and Linkscape ranking with search-related tools.
- SkipScreen 0.3.20091128_self
http://skipscreen.com/
Skips unnecessary pages on sites like Rapidshare, Megaupload, zShare, Mediafire, and more.
Wherever there are unnecessary pages and superfluous links, Skipscreen will be there.
- Tab Mix Plus 0.3.8.2
http://tmp.garyr.net
Tab browsing with an added boost.
- Tamper Data 10.1.0
http://tamperdata.mozdev.org
View and modify HTTP/HTTPS headers etc. Track and time requests.
- Trail-Mix 1.3.2Beta.1019
http://www.trail-mix.com/
Trail-Mix Activities, Notes and Files
- WebMail Notifier 1.5.5
http://webmailnotifier.mozdev.org/
Notifies your webmails
And yeah, I used extension list dumper to dump this list of addons...