• All-in-One Gestures – This extension allows you to execute common commands using mouse gestures, rocker navigation, scroll wheel navigation and page scrolling.
  • AutoMarks – Use the Location bar to autocomplete with URLs from your bookmarks.
  • Bookmarks Synchronizer – Bookmarks Synchronizer is a Mozilla Firefox extension that let you connect to an FTP/WebDAV server and synchronize your bookmarks that are stored in an XML file..
  • BugMeNot – Bypass compulsory web registration with the context menu via www.bugmenot.com.
  • ColorZilla – Advanced Eyedropper, ColorPicker, Page Zoomer and other colourful goodies.
  • deskCut – This extension adds desktop shortcut creation to the context-menu.
  • downTHEMall! – Filter the extensions of all the links present in a page and download the selected files or the pictures in just one click!
  • Flat Bookmark Editing – Edit bookmarks in the bookmark manager, without opening the properties window.
  • FLST – Focus Last Selected Tab.
  • Go To – Dig through URLs via the context menu.
  • Go Up – Easily navigate ‘up’ a level in a Web site.
  • ieview – Open pages in IE via Firefox menus.
  • LastTab – Allows tab navigation in a most recently used manner.
  • Linkification – Converts text links into genuine, clickable links.
  • ListZilla – Outputs an alphabetical list of either extensions or themes to a text, vB code, or HTML file.
  • miniT – Adds tab dragging with drop place indicator.
  • OpenBook – Allows for customization of the Add Bookmark dialog.
  • Paste and Go – Lets you paste an URL from the clipboard and directly load it.
  • SpellBound – Adds spell checker support to web forms and extensions.
  • Tab X – Adds a close button to each of the browser tabs.
  • text/plain – Treats selected plain text urls, and email addresses as links and adds options to the context menu on how to use these.
  • Web Developer – Adds a menu and a toolbar with various web developer tools.

Side note:

This list was created more or less automaticly using the ListZilla extension’s export to html function and then converted to Textile (for posting in TextPattern) using a search and replace in EditPlus with this regular expression:

Find: <a href="(.+)" title="(.+)">(.+)</a>(.+)<br />
Replace: * <a href="\1">\3</a> - \2\n

The html looked something like this:
<a href='http://www.chuonthis.com/extensions/' title='Allows for customization of the Add Bookmark dialog'>OpenBook</a> 1.2.0<br />.

(I had to use single quotes in the html, otherwise Textile removed the link.)