Working from the Most Used List:

• http://wiki.mozilla.org/MozillaQualityAssurance:Environments#Most_used_Add-on_.27s

Firefox results

marcia's results

• Extensions
  • Web Developer
  • User Agent Switcher
  • Greasemonkey
  • Gspace
  • Cooliris
  • Delicious bookmarks
  • Tabbrowser preferences
  • Firebug
  • Error: uncaught exception: [Exception... "'[JavaScript Error: "jsd has no properties" {file: "file:///Users/marcia/Library/Application%20Support/Firefox/Profiles/5aym641t.2004/extensions/firebug@software.joehewitt.com/components/firebug-service.js" line: 523}]' when calling method: [nsIFireBug::startProfiling]" nsresult: "0x80570021 (NS_ERROR_XPC_JAVASCRIPT_ERROR_WITH_DETAILS)" location: "JS frame :: chrome://firebug/content/profiler.js :: anonymous :: line 19" data: yes] in JS console using this extension

• Themes
  • Blue Ice

tomcat's results

• Adblock Plus
• IE Tab
• Flashgot
• Download Status Bar
• Forcastfox
• Fasterfox
• Noia 2 Theme
• Tab Mix Plus
• Downloadthem all
• Fire Ftp
• Web developer
• Adblock
• No Script
• PDF Download
• StumpleUpon
• Greasemonkey
• Blue Ice Theme
• Foxytunes
• Image Zoom
• Cooliris Preview
• Answers
• Firebug (run into one firebug bug)

• Note: Tested without problems with 2005

abillings results

• Extensions
  • Skype Extension
  • Adblock Plus
  • Flashgot
  • Download Status Bar
  • Forcastfox
  • Fasterfox
  • Tab Mix Plus

• Themes
  • Noia 2 Theme

Thunderbird Results

marcia's results

All extensions installed and functional.

• Extensions
  • Adblock Plus
  • Buttons
  • Display Mail User Agent
  • CuteMenus
  • Flashgot
  • Foxytunes
  • Enigmail
  • Mouse Gestures
  • Mozilla calendar (not comp)
  • Thunderbrowse

• Themes
  • Bible Tbird
  • Modern Modoki
  • Phoenity

tomcat's results

All extensions installed and functional.

• • Adblock Plus 0.7.5.1
  • DownThemAll! 0.9.9.10
  • Enigmail 0.95.2
  • FoxyTunes 2.9.2
  • Lightning 0.5
  • Nightly Tester Tools 1.2.1
  • Talkback 2.0.0.5

• Themes
  • Walnut Theme (not compatible)
  • Noia 2.0