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Attachment Viewer: view in a tab, slideshow

View attachments in TB
Images, office files, mp3, mp4
Use Dropbox viewer for 175 file types (in v3)
* Docx, xlsx, pptx, pdf preview
* Slideshow of images
* Zoom/drag to position
* Rotate/flip image
* Download dialog with thumbnail of image

Rated 4 out of 5 stars (20)
4,110 users

todowebapp

Adds browser action icon to toolbar to open To-Do. See https://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/04/microsoft-to-do-button/

Rated 4 out of 5 stars (2)
145 users

googlesearchwebapp

Adds browser action icon to toolbar to open Google-Web-Search. See http://thunderbird-essentials.thomas-bandl.de/wordpress/2020/10/05/google-websuche-button/

Rated 5 out of 5 stars (1)
154 users

Toggle Summary

Adds a Toggle Summary button

Rated 5 out of 5 stars (1)
79 users

Articles Toolbar

Adds the Articles toolbar

Not yet rated
23 users

Disable DragAndDrop (New)

Disable drag and drop on the folder tree in order to prevent unintended folder movement.

Rated 5 out of 5 stars (17)
3,539 users

G Suite in tab

Now you can open G Suite App in Thunderbird tabs. (Calendar, Contacts, Keep, Task and Drive)

Rated 5 out of 5 stars (7)
1,566 users

Spam Scores

Displays spam scores according to mail headers. Supports spam/ham score headers of Rspamd, SpamAssassin and MailScanner. The add-on adds a column with the overall spam score to the mail list view and shows details of any matched spam/ham rule.

Rated 4 out of 5 stars (17)
1,027 users

Next Unread Thread (Mark All Read)

Adds a Thread button, marks current thread or conversation as read and moves to the next unread message

Rated 5 out of 5 stars (4)
115 users

Minimize on startup

Minimize thunderbird window on startup!

Rated 4 out of 5 stars (7)
3,607 users

Pywalfox

Dynamic theming of Thunderbird using your Pywal colors.

https://github.com/Frewacom/pywalfox

Rated 3 out of 5 stars (6)
301 users

Group Favorite Folders

An extension for Thunderbird 115+ (Supernova) that groups and sorts favorites folders in the compact view.

Not yet rated
277 users

Dropbox Paper

How Does It Work?
Once you install the add-on, a new icon will appear in the Thunderbird toolbar. Simply click on the icon, and it will open the Dropbox Paper tab.

Will the Dropbox Paper Add-on Collect My Data?
Never.

Not yet rated
46 users

Compose Responsive Images

When writing new emails, newly inserted images are made responsive by setting style="max-width:100%" and removing width/height attributes.

Rated 5 out of 5 stars (1)
161 users

CloneMessage

When composing an email, CloneMessage allows you to duplicate the current state of the email.

Rated 5 out of 5 stars (1)
143 users

Quote Colors & Collapse

Configure text and background colors of quotes in mail and news messages. From up addon version 3 (Thunderbird 91) you can collapse quotes.

Rated 5 out of 5 stars (15)
4,480 users

changeQuote

It's an extension that changes the format of reply header.
You can choose between the standard Thunderbird reply header, a detailed reply header or a Customized reply header.
You can configure it in the Tools ->Add-on Preferences -> changeQuote.

Rated 4 out of 5 stars (22)
1,664 users

Toggle Message Pane

Adds a Preview Button, toggles the message preview

Rated 5 out of 5 stars (8)
519 users

Proton Calendar Toolbar Button

Adds a Proton Calendar button to the toolbar. The button simply opens a new tab with the https://calendar.proton.me webpage.

Rated 5 out of 5 stars (7)
655 users

TileNote

Tile notes, I provide this web app. to Mozilla Thunderbird users.
This is a derivative of RainbowNote, 7 colorful week notes, with tile like shapes.

Not yet rated
46 users