Appearance and Customization

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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 (16)
390 users

Weatherlicious

A dynamic theme based on weather data from OpenWeatherMap.

Rated 4 out of 5 stars (8)
388 users

Topic Tree / Notebook in TB

* A place to keep notes and ideas
* Notes can be styled with images, tables, links, mindmaps etc.
* Full text search
* Copy and paste text/html
* Drag text/html into tree to create new note
* Backup
* Print notes
* Notes for emails: XNote++

Rated 3 out of 5 stars (5)
376 users

ScrollAnywhere

Scroll without touching the scroll-bar!
Press Middle (Right / Left) mouse button anywhere on the page to scroll just like with scrollbar.

Features also:
- "grab and drag" scrolling
- customizable scrollbars!
- the Momentum auto-scroll

Rated 5 out of 5 stars (1)
373 users

Color Folders Requires Restart

Color your Folder Treeview Icons!

Rated 4 out of 5 stars (164)
368 users

Menu On Top (SuperMenu Avatar) Requires Restart

Move the Thunderbird menu bar to the top. Choose from a selection of visual styles + colors. Add frequently used bookmarks and an avatar icon without wasting precious screen space. Bookmark your favorite sites, emails, folders or configuration pages.

Rated 5 out of 5 stars (8)
345 users

Preferences Button

Adds a Preferences button

Rated 5 out of 5 stars (1)
341 users

userChromeJS

Load the contents of chrome/userChrome.js from the user's profile directory every time a window is opened. Also add a toolbar button which reloads userChrome.js in the current window.

Rated 5 out of 5 stars (8)
325 users

M-Hub Lite

Add Microsoft Office 365 Tabs to Thunderbird! Services supported by M-Hub Lite: Calendar, People, OneDrive, Word, Excel, PowerPoint, & Bing. Need business or enterprise support? Get M-Hub Pro: https://www.schiffner.com/software/m-hub-pro

Rated 3 out of 5 stars (5)
324 users

Menu Wizard Requires Restart

Customize menus : Helps removing, moving and renaming menus and menu items
Colorize important menu for ease of use! (use Style (CSS))
Change or disable any of used keyboard shortcuts
Support: Firefox, Thunderbird and SeaMonkey

Rated 5 out of 5 stars (251)
313 users

Pywalfox

Dynamic theming of Thunderbird using your Pywal colors.

https://github.com/Frewacom/pywalfox

Rated 3 out of 5 stars (6)
311 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 (5)
288 users

Lightning Colors Reminder Requires Restart

Let's show the calendar color on Lightning reminders!

Rated 4 out of 5 stars (4)
264 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)
261 users

UrgentMail

Raise X11 urgent flag if new mail is received.

This addon listens for incoming mails and causes the Thunderbird window to draw attention.

Rated 5 out of 5 stars (3)
258 users

Group Favorite Folders

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

Not yet rated
246 users

TabControl

Automatically close old tabs when opening new mails.

Rated 5 out of 5 stars (3)
243 users

Monterail Dark 2 for TB>68

Monterail Dark, a Thunderbird theme inspired by the mockup of Monterail

Rated 4 out of 5 stars (15)
232 users

Checkbox Column Requires Restart

Adds a custom column to Thunderbird's messages list (thread tree), making it easier to select multiple messages on devices with a touchscreen display.

Rated 5 out of 5 stars (14)
206 users

Show All Body Parts Requires Restart

Enable the View | Message Body As | All Body Parts message display mode.

Rated 4 out of 5 stars (22)
206 users