Miscellaneous

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URL Link

URL Link is a small Firefox and Thunderbird extension that allows you to select a non-URL in a mail/news message or web-page, and open it in a browser window.

Rated 4 out of 5 stars (45)
21,093 users
Updated June 3, 2014

AttachExtraTools

This extension gives more options and tools to attach files from compose window.

Rated 5 out of 5 stars (1)
741 users
Updated May 27, 2014

UnMHT No Restart

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 5 out of 5 stars (184)
84,808 users
Updated May 26, 2014

Auto Resize Image

Resizer for inline and attachment images (JPEG, PNG, BMP and GIF image formats).
All platforms are supported (Windows, Linux and Macintosh).

Rated 4 out of 5 stars (19)
10,786 users
Updated May 23, 2014

Addons Manager Hilite No Restart

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Rated 5 out of 5 stars (15)
872 users
Updated May 15, 2014

CuteButtons - Crystal SVG

add icons to buttons/menus/anywhere (CuteMenus - Crystal SVG not required)

Rated 4 out of 5 stars (77)
10,847 users
Updated May 10, 2014

Persona Switcher

Quickly switch between your personas or reset it back to the default via a menu or the keyboard. You can also automatically rotate through all of your themes on a time interval you select. Works for Firefox, Thunderbird, and Seamonkey.

Rated 5 out of 5 stars (21)
2,161 users
Updated May 9, 2014

DOM Inspector Plus! [dm]

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 5 out of 5 stars (2)
907 users
Updated May 3, 2014

ThunderBridge

P2P e-mail delivery.

Rated 4 out of 5 stars (1)
314 users
Updated May 1, 2014

Element Hiding Helper for Adblock Plus No Restart

Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.

Rated 5 out of 5 stars (372)
894,546 users
Updated May 1, 2014

Thunderbird2Jira (Create Jira Issue)

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 (8)
483 users
Updated April 24, 2014

Extension Test

A simple add-on for extension testers, especially AMO editors and developers who plan to submit their add-ons to AMO.

Rated 5 out of 5 stars (6)
234 users
Updated April 16, 2014

Test Pilot for Thunderbird No Restart

Add-on has now been discontinued, see below.

Rated 1 out of 5 stars (15)
8,413 users
Updated April 8, 2014

ProfileSwitcher

It adds some options to launch easily other profiles and the Profile Manager.

Rated 5 out of 5 stars (44)
25,223 users
Updated April 5, 2014

Calendar Tweaks

Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.

Rated 4 out of 5 stars (36)
14,419 users
Updated March 25, 2014

Extension Auto-Installer No Restart

For extension developers: allows automatically adding or updating browser extensions, e.g. with command line tools.

Rated 5 out of 5 stars (10)
2,825 users
Updated March 18, 2014

Clippings

Save frequently-entered text for pasting later.

Rated 4 out of 5 stars (137)
28,281 users
Updated March 17, 2014

L-Vin Thunderbird Brief Plugin

Versand von Papierbriefen über www.lvinpost.de

Rated 3 out of 5 stars (1)
5 users
Updated March 16, 2014

UxU - UnitTest.XUL

This is a testing tool for addon developers.

Rated 4 out of 5 stars (5)
24 users
Updated March 14, 2014

Workflow, e-signature Nathky

Nathky provides workflow service by Thunderbird cooperation with each other through e-mail messages including process and results, and create e-signature documents.

Not yet rated
33 users
Updated March 13, 2014