Every several months we have the same poll.

What I use :
Generated: Tue Dec 18 2007 17:31:33 GMT+0100 (Central Europe Standard Time)
User Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.6
Build ID: 2007112718

Enabled Extensions: [66]

* Active Stop Button 1.2
* Adblock Plus 0.7.5.3
* All-in-One Sidebar 0.7.2
* Bookmark Duplicate Detector 0.6.3
* Bookmarks LinkChecker 0.6.8.4
* Button Pack 0.8.5.5
* Calculator 1.1.10
* Clone Window 0.2.8
* Closy 1.4.0
* ColorfulTabs 2.0.8
* Converter 0.7.0
* Cookie Button in the status bar 0.8.9
* Copy All Urls 0.7.1
* Ctrl Tab Preview 0.2.1
* CuteMenus - Crystal SVG 1.9.1
* Deutsches Wörterbuch 1.0.1
* dotCOMplete 1.4.2
* Download Manager Tweak 0.7.2
* Download Sort 2.5.7
* Download Statusbar 0.9.5.2
* Duplicate Tab 0.9.1
* Enhanced Bookmark Search 0.1.4.04.1
* Enhanced History Manager 0.5.8.05.1
* Exch 1.3.0
* Fasterfox 2.0.0
* FEBE 5.1.1
* FireFTP 0.97.1
* FlashGot 0.7
* Forecastfox 0.9.6
* Google Icon 1.4
* Grab and Drag 2.5.0.3
* Greasemonkey 0.7.20070607.0
* Greek Translator 0.7.1
* IDM CC 4.0
* IE Tab 1.3.3.20070528
* Image Zoom 0.3
* infoRSS 1.1.2
* Java Console 6.0
* Java Console 6.0.02
* Java Console 6.0.03
* Megaupload SX.3.2 3.2
* Menu Editor 1.2.3.3
* MinimizeToTray 0.0.1.2006102615+
* Mouse Gestures 1.5.2
* MR Tech Local Install 5.3.2.6
* PDF Download 0.9.3.2
* Platypus 0.66
* QuickNote 0.6.0.3
* RealPlayer Browser Record Plugin 1.0
* Right Encoding 0.2.2
* Screen grab! 0.93
* Session Manager 0.6.1.6
* Show Image 0.4.2
* ShowIP 0.8.05
* Super DragAndGo 0.2.6
* SwiftTabs 0.3.4
* Tab Clicking Options 0.6.8
* Tab X 2.0
* Tabbrowser Preferences 1.3.1.1
* TabScroller 0.6.3
* Talkback 2.0.0.11
* Torrent Finder Toolbar 1.2.3
* Undo Closed Tabs Button 2.0
* Unicode converter 2.098
* United States English Dictionary 2.0.0.6
* Web Developer 1.1.4


Disabled Extensions: [2]

* English 's Proverbs 1.4.1
* Firefox Universal Uploader (fireuploader) 0.3.2


Total Extensions: 68

Installed Themes: [3]

* Firefox (default)
* macfoxII 2.1.4
* Metal Lion - Vista 1.7.8


Installed Plugins: (16)

* 2007 Microsoft Office system
* Adobe Acrobat
* AOL Media Playback Plugin
* IE Tab Plug-in
* Java(TM) Platform SE 6 U3
* Microsoft Office 2003
* Microsoft® DRM
* Mozilla Default Plug-in
* QuickTime Plug-in 7.1.3
* RealJukebox NS Plugin
* RealNetworks Rhapsody Player Engine
* RealPlayer Version Plugin
* RealPlayer(tm) G2 LiveConnect-Enabled Plug-In (32-bit)
* Shockwave Flash
* Shockwave for Director
* Windows Media Player Plug-in Dynamic Link Library
Quote Originally Posted by Husar
Opera.

I've got a copy of firefox and one of IE 7 installed as well, but never really use them, I just like the layout, security and possibilities of Opera without the need to install seperate addons for everything.
Why I am not suprised.