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Manually sort folders
This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
gContactSync
Requires Restart
Synchronizes contacts & groups between Thunderbird and Google Contacts.
ReminderFox
Requires Restart
ReminderFox displays and manages lists of reminders and tasks. ReminderFox uses easy-to-use lists with warnings/alarms to remind you of all your important appointments.
Synchronize ReminderFox with other calendars as well.
Keep in Taskbar
Requires Restart
A simple plugin that makes the Close button behave exactly like the Minimize one.
LightningButton
Requires Restart
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
Display Quota
Requires Restart
This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...
Lightning Colors Reminder
Requires Restart
Let's show the calendar color on Lightning reminders!
Calendar Tweaks
Requires Restart
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.
Duplicate Contacts Manager
Requires Restart
This Thunderbird add-on searches address book(s) for pairs of matching contact entries.
It can automatically delete entries that have equivalent or less information than the other one.
Any remaining matches are presented for manual treatment.
Account Colors
Requires Restart
Associates user-defined colors with POP3/IMAP accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.
AutoarchiveReloaded
Featured
Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)
Sieve
This Extension implements the ManageSieve protocol for securely managing Sieve Script on a remote IMAP server...
G-Hub Lite
Google Tabs for Thunderbird! G-Hub Lite supports Calendar, Contacts, Drive, Docs, Sheets, Slides, Maps, Search, & Voice. Need Google Workspace support (formerly G Suite)? Check out G-Hub Pro: https://www.schiffner.com/index.php/software/g-hub-pro
Thunderbook
Blinking Alert
Requires Restart
Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.
Todo.txt
Nostalgy
Requires Restart
Keyboard shortcuts to change folder, move/copy messages, with folder name auto-completion.
Search Results Sort By Date Not Relevance
Requires Restart
Makes search results sort by "date" instead of "relevance" by default.
IMAP Quota (Free Space)
Requires Restart
This Thunderbird addon lets you customize the IMAP quota statusbar panel.
ThunderLink
Requires Restart
Clickable, durable links to specific messages inside Thunderbird.
To create your own collections, you must have a Mozilla Add-ons account.
