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Provider for Google Calendar
Mail Merge
Create and Save or Send Multiple Individual and Personalized Messages from a Draft
DKIM Verifier
Send Later
Thunderbird Conversations
Featured
This addon provides a conversation view for Thunderbird, grouping messages together and allowing you to reply "inline" thus providing a more efficient workflow.
Signature Switch
Switch the signature on/off or choose a new one from your predefined set.
Lightning Calendar Tabs
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
QuickFolders (Tabbed Folders)
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Emoji
Addressbooks Synchronizer
Synchronizes selected addressbooks with other instances of thunderbird
using local files, webdav servers or imap servers
quickFilters
Quickly generate mail filters on the fly, by dragging and dropping mails and analyzing their attributes. Create a filter in less than 10 seconds, it's as easy as: drag, click, click.
By popular demand, supports SORTING filters alphabetically.
SmartTemplates
Featured
SmartTemplates offers an easy and powerful way to automatically create customized replies by auto-inserting various mail headers. Templates can be created for every mail identity, Stationery files can now be imported and used directly.
Confirm-Address
Automatic Dictionary
Remembers the language you use with a person or group of people, and switches the spellchecker language automatically for you next time. You do not have to do it manually any more. It remembers and switches it for you.
AutoarchiveReloaded
Featured
Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)
FiltaQuilla
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.
FlexConfirmMail
Confirm mail address and attachments based on flexible rules.
(This project was renamed from "Flex Confirm Mail" to "FlexConfirmMail", due to a branding reason.)
Grammalecte [fr] (for Thunderbird)
French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.
Allow HTML Temp
Allows to have HTML temporarily enabled (and displayed) in the currently selected message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (according to your settings).
To create your own collections, you must have a Mozilla Add-ons account.
