Add-ons
Newest Extensions
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Allow HTML Temp
Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).
Shift-Delete Controller
Requires Restart
Controls shift-delete button behavior. Confirmation dialog is optionally displayed in user defined...
Headers Toggle
Requires Restart
Gives Thunderbird a keyboard shortcut (H) to change how headers are displayed.
KbdMover
Requires Restart
Adds the ability to move mail from the keyboard with keystroke saving features similar to partial-completion-mode in Emacs...
Scroll Menus On Drag
Requires Restart
Scrolls menus when dragging, fixing bugs 194319, 240709, and 349932. Scrolls all autorepeatbuttons and prevents bookmarks menu hiding on all menuseparators.
Unselect Message
Requires Restart
Prevents Thunderbird from selecting the next message after you've deleted or moved the previously selected ones. Stay in control of which message you want to have selected and displayed in the preview pane; that piece of spam you're deleting...
Sync On Arrival
Requires Restart
Downloads new message headers (and bodies, if configured) immediately when Thunderbird detects new messages in an IMAP folder - that's more or less what the "download_on_biff" preference promises to do, but somehow fails to deliver...
Maximize Message Pane
Maximize message pane by collapsing the thread pane. You can read a message in larger area without opening a new message window...
Nightly Tester Tools Lite
Requires Restart
This is a cut down version of Nightly Tester Tools by Mossop, which is 77.6 KB. I've only included the "copy build id" and "build id in titlebar"...
Hebrew Calendar
Requires Restart
Show the Hebrew date in your browser's status.
Expression Search / GMailUI
Requires Restart
Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.
Quick Locale Switcher
Requires Restart
Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.
CuteMenus - Crystal SVG
Requires Restart
Note from Mozilla: This add-on has been discontinued. Try Menu Icons Plus instead.
Adds icons to all menus along with some other features...
Grocery List Generator
Requires Restart
The GLG (Grocery List Generator) is a helpful little tool to store your recipe-ingredients and other groceries you need regularly. It creates a well-organized grocery list to help make your grocery shopping as easy as possible.
Xpunge
Empties the Trash and Junk folders, and compacts folders in multiple Thunderbird accounts.
Address book synchronizer between Memotoo.com and Thunderbird
Requires Restart
Synchronize your address book between Mozilla Thunderbird and Memotoo.com !...
Correct Identity
Ever sent mail from the wrong email address because you forgot to select the correct identity?
ReminderFox
Requires Restart
ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.
To create your own collections, you must have a Mozilla Add-ons account.
