British English Dictionary R1.19 for Firefox, Thunderbird and SeaMonkey by David Bartlett.
To enable, right-click in a multi-line text box, select "Languages", then "English / United Kingdom".
Useful tools for the nightly tester.
Statusbar button to turn the proxy on and off with a single click.
Select text and it's automatically copied to the clipboard. Also pastes on middle click.
Displays an icon in the tooltip or next to the cursor indicating the target of a link.
Adds feed reading, notifications, favicons, and other enhancements to Live Bookmarks.
Note from Mozilla: This add-on has been discontinued. Try Add-on Update Checker instead.
Notifies you when updates are available for your extensions and themes.
Facilitates opening multiple tabs from the Bookmarks Menu and various other bookmark/history related dropdown menus. Less need to keep reopening menu, without using the sidebar. Optional auto-closing feature adds extra convenience.
Note from Mozilla: This add-on has been discontinued. Try Google Minimalist instead.
CustomizeGoogle enhances Google by adding information and removing unwanted information.
NextPlease! is a highly configurable extension that allows you to jump to next and previous links on search results pages, like Google, Yahoo, Ebay, Amazon, and many other sites. NextPlease! can be triggered via keyboard shortcuts, toolbar...
Collections are groups of related add-ons that anyone can create and share.Explore Collections