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Config Button

Adds a Config Button, opens about:config in a dialog or a new tab.

Rated 5 out of 5 stars (3)
2,292 users

Full Address Column

Adds a full sender and recipient e-mail column to message list panel.

Rated 5 out of 5 stars (71)
5,176 users

Start with Inbox

Selects the latest message in the Inbox after start of Thunderbird.

Rated 4 out of 5 stars (18)
1,767 users

PrintingTools NG

PrintingTools NG enables many layout and formatting options for printing messages with header borders, sorting, attachment lists etc. PDF output can be auto named and Page options can ease printer settings.

It is your printing toolbox.

Rated 4 out of 5 stars (38)
26,869 users

Minimize on startup

Minimize thunderbird window on startup!

Rated 4 out of 5 stars (7)
3,452 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 (21)
1,520 users

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)
4,664 users

Blinking Alert Requires Restart

Adds blink feature to the new-mail alert.
You can also disable auto-hiding of the alert.

Rated 4 out of 5 stars (29)
3,861 users

Simple Startup Minimizer

This extension will minimize Thunderbird on startup, it is very simple and I didn't put much work into it but it should work on all platforms. Please let me know if you want more features added into it.

Rated 4 out of 5 stars (30)
6,813 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)
4,412 users

Hide Local Folders Requires Restart

Removes the "Local Folders" entry from the folder pane.

Rated 4 out of 5 stars (46)
2,393 users

KeepRunning

Once you close Thunderbird you will no longer be able to see your new emails. This plugin keeps Thunderbird active in the background, meaning you can still receive your new emails after closing the app. Use this when the app is in the startup.

Rated 5 out of 5 stars (5)
1,573 users

Disable DragAndDrop (for Thunderbird 68+)

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

Rated 5 out of 5 stars (17)
3,305 users

Minimize on Close

Causes Thunderbird's main window to minimize instead of closing. You can still close Thunderbird through the menu.

Rated 4 out of 5 stars (81)
38,242 users

Emoji

It permits just with a single click to copy an emoji.
There is a search-box and the "Most used emojis" section (the first one).

If you want to send feedback or report bug, please go to https://github.com/Sav22999/emoji

Rated 5 out of 5 stars (12)
5,216 users

Theme Font & Size Changer (fixed)

Fixed version (no 90 day timer till silent failure) of the popular "Theme Font & Size Changer for Thunderbird" addon

Rated 4 out of 5 stars (79)
1,694 users

Tag Toolbar / Tag Popup

Add toolbar for toggling tags.

Rated 4 out of 5 stars (84)
17,120 users

Search Button

Toolbar button to invoke message search dialog window.

Symbolleistenschaltfläche, um das Dialogfeld für die Nachrichtensuche aufzurufen.

Rated 5 out of 5 stars (9)
2,658 users

Filter on Folder Button

new in version 1.5.1:
code optimised for Thunderbird version >= 115

new in version 1.5:
code changed to popup menu

functions:
new menu button with filter functions, with hotkeys, theme support, more languages

Rated 4 out of 5 stars (25)
1,199 users

Colored Folders Requires Restart

Add colors to your folders in Thunderbird!
Must-have for better organisation + intuitive and speedy workfow...

This is project "Color Folders" (originally by Fisheater), corrected, resurrected, restaurated, extended and republished.

Rated 4 out of 5 stars (151)
4,067 users