Lightbird Requires Restart
Standalone calendar UI for Lightning
Reinstates the extensions.checkCompatibility preference.
Lets the user direct the submission of a form to a new tab or window. [Bug #17754]
FiltaQuilla Requires Restart
Adds many new mail filter actions - launch a file, suppress notification, remove star or tag, mark replied or unread, copy as "read", append text to subject.
CardDAV Browser Requires Restart
A utility to browse vCards stored on a CardDAV server.
Highlighter Requires Restart
Quickly highlight some text in Thunderbird message composing windows.
Contact Photos Requires Restart
Displays contact photos in the message header.
Add-on Update Checker Requires Restart
Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.
Copy As Plain Text Requires Restart
Removes formatting from copied text.
AutoPager Fixed Requires Restart
AutoPager Fixed is a working version of AutoPager extension for Firefox 36+ (non-E10s mode) to autoload the next page(s) when you scroll pages.
ATTENTION: DISABLE THE ORIGINAL AUTOPAGER ADDON!
Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.
ScrapBook X AutoSave Requires Restart
Automatically saves web page to ScrapBook on browsing.
tzpush Requires Restart
Z-Sync to Thunderbird Addressbook
Will sync Thunderbird address book to Zentyal, Zarafa, Horde and outlook.com/hotmail.
Extension List Dumper 2 Requires Restart
This extension adds a button ("Dump list") to the Add-ons window. When this button is pressed, a new window is opened with the list of installed extensions, themes or plugins...
Quote Colors Requires Restart
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
GO ADS FREE NOW!
Browse Safely. Optimize Surfing
XDM Hook for Linux & Mac OS X Requires Restart
XDM integration module for Firefox on Linux and Mac
Toggle Word Wrap Requires Restart
Toggle word wrapping and PRE element wrapping in the message composition and HTML display windows, respectively.
BBCodeXtra Requires Restart
(Sorry, no plans to port this add-on to Webextensions)
BBCodeXtra is an extension, compatible with Mozilla FireFox (up to 57) and Seamonkey, which adds to the context menu new commands to insert BBCode/Html/XHtml codes in an easy and fast way...
EDS Calendar Integration Requires Restart
Integrates calendars events with Gnome clock applet
Plugin may hang on Fedora.
As a workaround uninstall evolution-ews.