IMAP Quota (Free Space) Requires Restart

This Thunderbird addon lets you customize the IMAP quota statusbar panel.

Rated 5 out of 5 stars (1)
2,713 users
Updated March 16, 2018

GmailOutOfOffice Requires Restart

Out of Office for Gmail

This add-on allows you to set an out of office auto-responder in your gmail account. It adds a button in the toolbar customization list.

Rated 4 out of 5 stars (1)
237 users
Updated March 15, 2018

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 (8)
17,171 users
Updated March 12, 2018

Dorando keyconfig Requires Restart

A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)

As of version 2016.2, Custom keys (using custom JavaScript) work again!

Rated 5 out of 5 stars (35)
10,814 users
Updated Feb. 27, 2018

Gmail Buttons Requires Restart

Adds message-specific buttons to Thuderbird that are consistent with the way Gmail handles Trash and Spam.

TB<16 Users - Download here.

Rated 4 out of 5 stars (8)
614 users
Updated Feb. 18, 2018

ThunderStats! Your Thunderbird Statistics! Requires Restart

Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!

Rated 4 out of 5 stars (4)
1,387 users
Updated Feb. 14, 2018

ImportExportTools Requires Restart

Adds some tools to import and export folders and messages

Rated 4 out of 5 stars (175)
441,533 users
Updated Feb. 14, 2018

Subject Manager Requires Restart

Manages subject of composed emails.

Rated 5 out of 5 stars (14)
2,406 users
Updated Feb. 11, 2018

Mail Redirect Requires Restart Featured

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

Rated 4 out of 5 stars (126)
36,316 users
Updated Jan. 29, 2018

Classic Toolbar Buttons [Fx45-56][Tb24-58]

'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.

Beta builds on versions page!

Rated 5 out of 5 stars (144)
23,697 users
Updated Dec. 8, 2017

Caret Out Requires Restart

Disables change of the caret browse mode by shortcut key(F7).

Rated 5 out of 5 stars (3)
198 users
Updated Nov. 3, 2017

DownloadStudio Firefox Integration Requires Restart

Firefox Integration for DownloadStudio

Not yet rated
39 users
Updated Oct. 25, 2017

DOM Inspector Plus! [dm] Requires Restart

Improved DOM Inspector! [dm version]. Box Model new layout & more data, see screenshot!. Horizontal scroll for Dom-Tree, and some more.
Inspects the structure and properties of a window and its contents.

Rated 4 out of 5 stars (6)
358 users
Updated Sept. 27, 2017

Auto Compress File Requires Restart

Compressor for attachment files. All platforms are supported (Windows, Linux and Macintosh).

Rated 5 out of 5 stars (18)
3,788 users
Updated Sept. 18, 2017

Thunderbird Integration for JIRA Requires Restart

This is a plugin for Thunderbird 3.3+ which is able to create Atlassian Jira issues out of e-mails or add the content of an e-mail as a comment on an Jira issue.

Rated 4 out of 5 stars (11)
338 users
Updated Sept. 8, 2017

LaTeX It! Requires Restart

This addons allows you to write LaTeX expressions in your emails such as $x^2$ or $$\sum_{x=0}\infty$$ and have them all replaced by a PNG image with the corresponding formula inside.

Rated 4 out of 5 stars (28)
2,041 users
Updated Sept. 6, 2017

Profile Folder Button

Adds profile folder/directory button.

Rated 4 out of 5 stars (3)
1,126 users
Updated Aug. 9, 2017

AutoConfiguration Hook Requires Restart

Provides ability to create E-mail accounts for specific ISP via the account creation wizard.

Not yet rated
4,978 users
Updated July 21, 2017

GPO support For Firefox and Thunderbird

For work with new versions, use autoconfiguration module https://mozillagpo.sourceforge.io/
Firefox and Thunderbird extension to manage user preferences and user profile CA certificates using group policy

Rated 4 out of 5 stars (12)
28,302 users
Updated July 14, 2017

Rescue Conflicting Alternatives Requires Restart

Converts a mail with conflicting alternative bodes to regular multipart mail.

Not yet rated
22 users
Updated July 11, 2017