Minimize On Start and Close

A remake of the MinimizeToTray-extension made to fit the Windows 7 taskbar. Instead of minimize the window to the tray it minimize it to the taskbar. It can minimize on startup, when the window is closed and/or when the esc key is pressed.

Rated 4 out of 5 stars (95)
40,731 users

Classic Toolbar Buttons No Restart

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (144)
40,166 users

Copy Plain Text 2

Copies text without formatting

Rated 5 out of 5 stars (62)
39,562 users

Nightly Tester Tools

Useful tools for the nightly tester.

Rated 4 out of 5 stars (191)
38,028 users

Tiny JavaScript Debugger

TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.

Rated 4 out of 5 stars (5)
35,920 users

Display Quota

This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...

Rated 4 out of 5 stars (29)
34,958 users

Font Finder

FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.

Rated 4 out of 5 stars (66)
33,612 users

Mail Redirect Featured

Allow to redirect (a.k.a. "remail") mail messages to other recipients.

Rated 4 out of 5 stars (124)
33,367 users


Adds some options to print messages and addressbooks

Rated 4 out of 5 stars (21)
27,172 users

Copy As Plain Text

Removes formatting from copied text.

Rated 4 out of 5 stars (56)
26,459 users


A simple note-taking extension.

Rated 5 out of 5 stars (169)
26,281 users

Thunderbird Message Filter Import/Export Enhanced

Thunderbird Message Filter Import/Export Enhanced is a compatibility port of Wind Li's add on.
Original add on here: https://addons.mozilla.org/en-US/thunderbird/addon/thunderbird-message-filter-imp/

Rated 3 out of 5 stars (41)
23,534 users

Cleanest Addon Manager No Restart

Cleanup your Addon Manager

Rated 5 out of 5 stars (128)
22,571 users


Select text and it's automatically copied to the clipboard. Also pastes on middle click.

Rated 4 out of 5 stars (521)
22,409 users

Filter Uploader for Adblock Plus

DOES NOT BLOCK ADS! Don't install this add-on if you don't know what 'uploading' means!

This add-on Uploads the filters from your Adblock Plus installation to a FTP, HTTP, HTTPS server...

Rated 3 out of 5 stars (45)
22,330 users

Dropbox for Filelink

Add Dropbox support to Thunderbird's Filelink feature.

Rated 4 out of 5 stars (34)
21,683 users


Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.

Rated 5 out of 5 stars (14)
21,678 users

Dafizilla Table2Clipboard

Mozilla applications allow to select rows and columns from a table simply pressing Control key and picking rows/columns with left mouse button.
The selection can be copied to clipboard but the original table disposition is lost making ugly results wh...

Rated 5 out of 5 stars (63)
19,573 users

Google Tasks Sync

Manage your tasks from Thunderbird, even while offline.

Rated 4 out of 5 stars (63)
19,178 users

AutoCopy 2

Copies selected text to the clipboard automatically.

Rated 5 out of 5 stars (57)
18,701 users