I have listed my extensions that I use with Firefox. I am in the mood to find a new extension, either very useful, or just cool. I have tried going through the recommended list on Mozilla's site, but most are crap or I have already. So I am hoping people here can give me some ideas once looking at my list.

Thanks!

Generated: Tue Oct 20 2009 00:10:59 GMT-0400 (Eastern Daylight Time)
User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Build ID: 20090824101458

Enabled Extensions: [47]
- Adblock Plus 1.1.1
- Battlefield Heroes Updater 4.0.21.0
- Better GCal 0.3
- Better Gmail 2 0.9.5
- Better GReader 0.8
- Boost for Facebook 9.8.6
- bug447571.xpi 1.1
- CLEO 4.3
- ColorfulTabs 3.9.4
- Compact Menu 2 2.3.2
- CustomizeGoogle 0.76
- CuteMenus2 3.1
- Download Statusbar 0.9.6.5
- Exch 1.4.5
- Extended Statusbar 1.5.4
- Fasterfox Lite 3.8.2Lite
- FastestFox 3.0.0
- Favicon Picker 2 0.6.0.12
- FEBE 6.3
- Fission 1.0.9
- Forecastfox 0.9.10.1
- Gmail Manager 0.5.7.4
- GooglePreview 3.22
- gReactions 0.1e
- IE View Lite 1.3.5
- ImageHost Grabber 1.5.7
- Integrated Gmail 2.1.1
- Java Console 6.0.16
- LastPass 1.51.4
- Locationbar² 1.0.3
- Menu Editor 1.2.6
- MR Tech Toolkit 6.0.3.4
- Organize Status Bar 0.6.3
- Personas 1.3
- RAMBack 1.0
- Screengrab 0.96.2
- Searchbar Autosizer 1.4.2
- Shareaholic 1.9
- SkipScreen 0.1.07282009_url_fix
- Smart Bookmarks Bar 1.4.3
- Stylish 1.0.6
- Tab Mix Plus 0.3.7.4pre.090516
- TabRenamizer 0.9.6
- Update Notifier 0.1.5.5
- URL Fixer 1.5
- Web Developer 1.1.8
- Xmarks 3.3.3

FabTabs

These are some of the extensions I have which I didn't see on your list.

Brief - My favorite RSS reader for Firefox. All items and their contents are listed in order.
Coral IE Tab - IE Tab embeds Internet Explorer into Firefox. Coral IE Tab adds support for Adblock and sync cookies.
Video DownloadHelper - Downloads videos from popular sites like Youtube and several others.
DownThemAll - A more powerful download manager built directly into Firefox.
RefControl - Allows you to block HTTP referrers when you click a link, so websites don't know where you just came from.
SmartPager - Intelligently increments numbers in the URL for prev/next page. You can find a version compatible with Firefox 3.5 here.
Tab History - Copies the history of the current tab when opening a link in a new tab. Simple, but I love it.
Tab Popup - Displays a thumbnail of the current tab in a popup. Tab Scope does the same thing, but I prefer the simplicity of Tab Popup.
Tree Style Tab - Shows tabs like a tree. Tabs are indented underneath the parent tab that opened them.
Update Scanner - Scans pages for updates, changes are highlighted in yellow. Useful for sites without an RSS feed.

I use IE Tab so Coral IE Tab sounds cool. Also Tab History is quite useful. Awesome.

Keep them coming!

Here is an updated list since yesterday.

Generated: Tue Oct 20 2009 16:53:40 GMT-0400 (Eastern Daylight Time)
User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 (.NET CLR 3.5.30729)
Build ID: 20090824101458

Enabled Extensions: [50]
- Adblock Plus 1.1.1
- autoHideStatusbar 0.4.4
- Battlefield Heroes Updater 4.0.21.0
- Better GCal 0.3
- Better Gmail 2 0.9.5
- Better GReader 0.8
- Boost for Facebook 9.8.6
- bug447571.xpi 1.1
- CLEO 4.3
- ColorfulTabs 3.9.4
- Compact Menu 2 2.3.2
- Coral IE Tab 1.60.20090901
- CustomizeGoogle 0.76
- CuteMenus2 3.1
- Download Statusbar 0.9.6.5
- Exch 1.4.5
- Extended Statusbar 1.5.4
- Fasterfox Lite 3.8.2Lite
- FastestFox 3.0.0
- Favicon Picker 2 0.6.0.12
- FEBE 6.3
- Fission 1.0.9
- Forecastfox 0.9.10.1
- Gmail Manager 0.5.7.5
- GooglePreview 3.22
- gReactions 0.1e
- ImageHost Grabber 1.5.7
- Integrated Gmail 2.1.1
- Java Console 6.0.16
- LastPass 1.51.4
- Locationbar² 1.0.3
- Menu Editor 1.2.6
- MR Tech Toolkit 6.0.3.4
- Organize Status Bar 0.6.3
- Personas 1.3
- RAMBack 1.0
- Save File to 1.3.1
- Screengrab 0.96.2
- Searchbar Autosizer 1.4.2
- Shareaholic 1.9
- SkipScreen 0.1.07282009_url_fix
- Smart Bookmarks Bar 1.4.3
- Stylish 1.0.6
- Tab History 1.0.6
- Tab Mix Plus 0.3.7.4pre.090516
- TabRenamizer 0.9.6
- Update Notifier 0.1.5.5
- URL Fixer 1.5
- Web Developer 1.1.8
- Xmarks 3.3.3

Disabled Extensions: [1]
- IE View Lite 1.3.5

You can edit your original post

No greasemonkey? Or firebug? or Live HTTP headers? Those are kind must haves

I use Stylish instead of Greasemonkey, firebug is ftp right? I don't need that.

And Live HTTP Headers?

And yes, I forgot I can edit the first post, I am used to not being able to edit after awhile.

Firebug is a debugger, essential for any developer, more so than the web developer toolbar.


Edit: I have just now disabled the web developer toolbar after realising that I completely stopped using it and now solely work with Firebug.

Live http headers is also for developers or debugging sites, etc.. I use it quite often as a quick easy way to see what is going on with a website, etc.

As to stylish vs greasemonkey -- not even in the same league

Yea I know, Stylish is 20x better lol It does everything greasemonkey does, all the same scripts plus more.

You can just use both. Greasemonkey can do thing that Stylish cannot.

As for extensions you might find useful:

Linkification
BBCode
Copy Link Name
Redirect Cleaner

Thanks for those, BBCode is awesome!