Up & Coming Extensions
SoundPlus Requires Restart
SoundPlus customizes the sound that is played when a new message arrives for a particular contact in the address book, similar to mobile phones. There is also a variation that is played when a message arrives and it is a continuation of a thread.
Header Tools Lite Requires Restart
Allows to modify the header and the source of messages
Duplicate Contact Manager Requires Restart
Facilitates handling of duplicates in your address book(s). Allow to search and remove similar contacts.
EnForward Requires Restart
Save your email into Evernote by forwarding it to Evernote email address.
Before you use it, you need to specify your Evernote email address (see the screenshot).
This function can be invoked by "Forward to Evernote" in the context menu.
EditEmailSubject (Edit email Subject) Requires Restart
This module allows you to change/edit email subjects
SortPref Requires Restart
Adds the ability to control primary, default sorting and threading options.
Restart application Requires Restart
Restart the application with one click (or Ctrl Shift Z)
Forward Requires Restart
Add Inline / As Attachment option to Forward button and Message context menu.
FireTray Requires Restart
A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...
Copy Sent to Current Requires Restart
Allows to place a copy of sent messages (aka FCC) into the currently active folder or any other folder you choose, when you create the message. Usually the copies are placed into the 'Sent' folder. For replies, you may also move the original message.
Nostalgy Requires Restart
Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.
This Extension implements the ManageSieve protocol for securely managing Sieve Script on a remote IMAP server...
ThreadKey Requires Restart
Strike the 'T' key to sort messages by thread, strike the 'U' key to sort them unthreaded again, just like the 'G' key switches to Grouped By Sort view
Send Later Requires Restart
True "Send Later" functionality to schedule the time for sending an email.
SyncKolab Requires Restart
SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (http://kolab.org).
DOM Inspector Requires Restart
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Lightning Colors Reminder Requires Restart
Let's show the calendar color on Lightning reminders!
Get All Mail Button Thunderbird Requires Restart
Adds a toolbar button to Get All Mail Accounts in Thunderbird.
Search Results Sort By Date Not Relevance Requires Restart
Makes search results sort by "date" instead of "relevance" by default.
ThunderKeep Requires Restart
Google Keep for Thunderbird