Up & Coming Extensions

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Disable Add-on Compatibility Checks

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Rated 4 out of 5 stars (108)
114,441 users

attachment column in search result list Requires Restart

Show the column for attachments in search results list. General search (edit-> search -> search emails) does not show by default if a message has attachments.
This addon adds this column, just as in a normal folder view.

Not yet rated
11 users

Reply to Multiple Messages

Add menu commands for replying to multiple messages at the same time.

Not yet rated
10 users

One-by-One Forward Requires Restart

Highlight multiple emails, right-click, then select "One-by-One Forward". This extension will allow you to forward the selected emails, one-by-one, to the recipients you specify using your choice of attachment handling.

Not yet rated
15 users

QuickMultiselect Requires Restart

Adds a column with checkboxes so that you can select multiple messages with only a mouse click.

Not yet rated
46 users

WarnAttachment Requires Restart

WarnAttachment shows an additional dialog to confirm potentially dangerous attachments. Some attachments like executables etc. are completely blocked. This reduces the risk of malware especially for inexperienced users.

Rated 5 out of 5 stars (1)
69 users

Grammalecte [fr] (for Thunderbird) Requires Restart

French grammar checker. Included: conjugation tool, text formatter and spelling dictionaries.

Rated 5 out of 5 stars (3)
651 users

Copy Message ID Requires Restart

Adds a button to the message view toolbar to copy the message ID to the clipboard. This is useful when sending email replies via the command line.

Not yet rated
28 users

AddressBook in Tab Requires Restart

Adds a button that can be put in toolbars which opens the addressbook in a new tab like pastismans AddressBookTab

Rated 4 out of 5 stars (2)
540 users

AdvancedTasks Requires Restart

Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.

Not yet rated
5 users

Nextcloud for Filelink NG Requires Restart

"Nextcloud for Filelink" is an Open Source Thunderbird extension which makes it easy to send large attachments with Thunderbird by uploading them first to a Nextcloud server and by then inserting the link into the body of your email.

Not yet rated
23 users

Quick Folder Key Navigation Requires Restart

This extension makes it possible to quickly navigate to a particular folder in the folder pane simply by typing the first few letters of the folder name when the folder pane has focus.

Not yet rated
93 users

TipsTrade Ticket Buttons Requires Restart

This extension parses emails for TipsTrade Tickets and VRMs and creates a menu that links directly to the vehicle in the Broking Applications. Add the "Ticket" button to the email preview toolbar. Click on the button to generate tipstrade:// links

Not yet rated
2 users

Keep in Taskbar Requires Restart

A simple plugin that makes the Close button behave exactly like the Minimize one.

Not yet rated
400 users

MyAdFilter

With MyAdFilter, free content creators propose you only one ad. Apart from those, as your usual ad-blocker, MyAdFilter disables all ads.

Not yet rated
46 users

Great DANE Requires Restart

Retrieve DANE S/MIME Certificates for Encryption/Signing.

This extension enables users to automatically retrieve S/MIME certificates using the Great DANE Engine (https://github.com/grierforensics/Great-DANE-Engine).

Not yet rated
34 users

Request Assistant Requires Restart

Currently logs all URLs accessed by the app (into app console & into standard output stream (using dump()), whether the request is explicitly made by the user or automatically made by the app itself.

Not yet rated
16 users

lightningWeather Requires Restart

LightningWeather shows the weather forecast in the background of the calendar so you can easily coordinate your activities with the weather.

Rated 4 out of 5 stars (4)
558 users

Lightning Invitation Notifier Requires Restart

This extension is an extension to Mozilla Lightning for Thunderbird.
It shows a toast message and opens the invitations window when an invitation arrives.

Rated 3 out of 5 stars (1)
845 users

Protected E-mail Addresses Requires Restart

Generates protected and disposable e-mail addresses and filters junk mail sent to invalid addresses.

Rated 4 out of 5 stars (1)
120 users