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Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
1,100 users

RemindMe

Moves email into Inbox/RemindMe folder, and moves it back into Inbox after chosen time.

Rated 5 out of 5 stars (4)
370 users

Thematic

Quickly switch between your themes or back to the default.

Rated 1 out of 5 stars (1)
522 users

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.

Rated 4 out of 5 stars (9)
388 users

Deselect on Delete TB78

Disables selection of the next message when deleting.

A quick port of squib's "Deselect on Delete" for thundebird 78.

Rated 4 out of 5 stars (18)
484 users

ThunderWebTabs

Opens Google Keep, Google Photos, Android Messages or any other website in Thunderbird's tab.

Users who encounter "Browser not supported errors" should try changing their User Agent. For more details, please visit the "Support site".

Rated 5 out of 5 stars (1)
288 users

Mark All Read:WE

Mark all read (Web extension) - Adds a toolbar button to mark all unread messages in current folder as read.

*Note*
Version 2: Requires Thunderbird v128+
Version 1: Works best with Thunderbird v91+

Rated 3 out of 5 stars (19)
992 users

Change Link Appearance

Changes the appearance of links when displaying a message

Not yet rated
88 users

Last selected message

The add-on remembers the last selected message in visited folders. After restarting Thunderbird, when we enter the previously visited folder, this message will be displayed, just like in Microsoft Outlook.

Rated 3 out of 5 stars (5)
175 users

Open Google Tabs

Open up Google Calendar, Notes, and Microsoft Outlook in a new tab.

Not yet rated
99 users

Microsoft To Do - Quick Access

Quick Access to Microsoft To Do (Live) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 5 out of 5 stars (1)
424 users

ThunderSuite - Customize your Quick Access Sidebar

This extension allows user editing of the spaces sidebar.
Create custom spaces from the extension options, to turn the new toolbar introduced with Supernova into your personal quick access toolbox.

Rated 5 out of 5 stars (8)
355 users

Get All Senders

This add-on retrieves all the senders associated with the emails in this mailbox and stores them in your clipboard.
For more information and to report an issue, please visit the project home page at https://github.com/CicadaCinema/get-all-senders .

Rated 4 out of 5 stars (5)
290 users

RepSel: Reply to all selected mails

Reply to all selected messages with a single button press. E.g., compose a reply to all emails in a folder or those matching a search. Req. permissions: menues to add UI, messageRead to get sender, compose to add recipients, storage for settings.

Rated 4 out of 5 stars (3)
109 users

Topic Tree / Notebook and Wiki in TB

* Keep notes and ideas
* Style with images, tables, links, mindmaps etc.
* Full text search
* Copy and paste text/html
* Use templates
* Link notes
* Backup
* Print notes
* Real time sync/replication to other TB/FF installations

Rated 3 out of 5 stars (6)
398 users

composeSelectMacro

定型文4つ保存しておいて、メールを作成する時にそのテキスト文を挿入できるツールです
You can prepare four fixed phrases, select them when composing an email, and insert them in the body of the email.

Not yet rated
34 users

Gemini - Quick Access

Quick Access to Google Gemini AI (formerly Bard) in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Rated 5 out of 5 stars (1)
304 users

GetMyInvoices

Save your attached PDF invoices or archive and store complete invoice e-mails directly to your GetMyInvoices account from Thunderbird

Not yet rated
13 users

acus

Update 2023: This addon will be replaced by "arcus".

Modern encryption in Thunderbird

** Currently in testing phase **
What you can do:
1. Set your secret key and automatically decrypt emails
2. Generate a new key pair
3. Encrypt plain text

Not yet rated
3 users

UnInbox - Quick Access

Quick Access to UnInbox in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.

Not yet rated
8 users