Appearance and Customization

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Toggle HTML

Adds a Toggle HTML button

Rated 4 out of 5 stars (8)
1,012 users

CuteButtons

Adds icons to buttons and/or menus.

Rated 4 out of 5 stars (95)
67 users

Page Colors & Fonts Buttons

Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.

Rated 5 out of 5 stars (8)
8 users

Maximize Message Pane

Maximize message pane by collapsing the thread pane. You can read a message in larger area without opening a new message window...

Rated 4 out of 5 stars (35)
211 users

Addon Compatibility Check for TB 102/TB 115

Checks all installed add-ons for compatibility with Thunderbird 102 (or TB 115) and displays status information on a button in the main toolbar. This button will open a detailed overview, including links to alternatives for abandoned add-ons.

Rated 4 out of 5 stars (10)
16,863 users

Extensor

Quick access to add-on functions from a toolbar panel: Options, (De)Activate, Details, Home page, Review page, Donation page, Uninstall, Restart application.

Rated 5 out of 5 stars (5)
2 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)
6,488 users

Mark All Read Button Requires Restart

Adds toolbar buttons to Mark All emails as Read, Mark Thread as Read, and Goto Next Unread Thread.

Rated 4 out of 5 stars (52)
661 users

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 4 out of 5 stars (10)
9 users

Thin Tabs

Extremely thin tabs optimized for the squared variants of Classic Theme Restorer.

Please see description for updates!

Rated 4 out of 5 stars (14)
3 users

No need flash plugin on embeded youtube movies

No need flash plugin on embeded youtube movies

Rated 4 out of 5 stars (25)
48 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 (78)
37,710 users

Lightning Colors Reminder Requires Restart

Let's show the calendar color on Lightning reminders!

Rated 4 out of 5 stars (4)
270 users

Link in Tab

Link in Tab allows you to:
- Left click => open link in new tab
- Left double-click => open link in browser
- Middle click => open link in browser and close current tab

Rated 4 out of 5 stars (4)
532 users

Close last tab with middle-click

THIS ADD-ON IS NOW UNNECESSARY FOR FIREFOX 31 AND UP!

Tired of middle-clicking on the last tab in Thunderbird, only to have nothing happen? This add-on embraces the industry-standard middle-click behavior of IE, Chrome, and Firefox (3.6- and 31+).

Rated 5 out of 5 stars (3)
0 users

SanRockstar Requires Restart

Music

Rated 5 out of 5 stars (3)
0 users

Window Master

Functionality for multiple screens and windows. Easily open links in other windows or on other screens, move or merge tabs, and move or merge entire windows. With graphical controls for grid positioning.

Rated 4 out of 5 stars (23)
4 users

Thunderkey

Lets you perform common email tasks using keyboard shortcuts.

Rated 5 out of 5 stars (2)
4 users

Zoom Button for Thunderbird Requires Restart

Zoom in, zoom out, and reset zoom with one toolbar button. Works in the Compose window too.

Rated 4 out of 5 stars (12)
59 users

G-Hub Lite

Google Tabs for Thunderbird! G-Hub Lite supports Calendar, Contacts, Drive, Docs, Sheets, Slides, Maps, Search, & Voice. Need Google Workspace support (formerly G Suite)? Check out G-Hub Pro: https://www.schiffner.com/index.php/software/g-hub-pro

Rated 4 out of 5 stars (22)
3,982 users