I've been thinking of putting a list of the firefox extensions I use on my blog for a while, and then Dean listed the extensions he finds useful and asked what anyone else was using - so I decided I should post it! So here is my list of firefox extensions:
All in one gestures
Extension that helps you to navigate the web just using the mouse - includes mouse gestures and extra wheel navigation
Web Developer Extension
Very useful extension with lots of CSS tools and tricks which is especially useful for designing and testing webpages
Sage
Sidebar RSS Reader for Firefox
Livelines
Changes the live bookmarks icon to add RSS feeds to Sage
IE View
Useful for testing pages to check that they work both in IE and Firefox, also for the pages that are designed not to work in Firefox.
Link Toolbar
Site navigation toolbar - useful for navigating blogs and forums - provides buttons for next and previous pages (and other related pages - but I use next and previous most)
OpenBook
Extension to open the bookmarks dialog with the full tree automatically
Colorzilla
Useful extension to check what colour things are! - Can pick up colours from pictures and webpages and copy them to the clipboard in different formats
Autofill
Automatically fills in forms - like the same feature from the google bar
Bookmarks Synchronizer
Backs up a copy of my bookmarks to my website
Scrapbook
For taking notes and recording websites
HTML Validator
For checking website source code
Outliner
Adds a sidebar of document structure
GeoURL
Adds a status bar icon to show if the current page has geographic information
[PDF Download](https://addons.mozilla.org/extensions/moreinfo.php?id=636&application=firefox)
Gives and option on clicking a PDF link whether to download or view in the browser.
All In One Sidebar
Adds a toolbar of sidebar options
Also you can see which search plugins I use.