Appearance and Customization


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 (11)
2,205 users

Lightning Calendar Tabs Requires Restart

Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.

Rated 4 out of 5 stars (8)
26,881 users

Posting Style Enforcer Requires Restart

Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.

Rated 5 out of 5 stars (3)
50 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 (11)
3,403 users

Get/Send-Button (minimized MagicSLR) Requires Restart

A combined Get/Send-Button and a popup menu with additional functions.

You may want to use it together with the following Add-ons:
* Send Later Button (by me / Alexander Ihrig)
* Send Later (by jikamens)

Rated 4 out of 5 stars (43)
10,827 users

Seturgent Requires Restart

Sets the urgent flag (X11) of the Thunderbird window under Linux in case of new messages. Does ignore special folders like Drafts, Junk and such.

Rated 5 out of 5 stars (2)
56 users

Dstocks Requires Restart

Displays stock market indices in the status bar.
Delay of updates on option (default : every 10 mn) or on click.
Right-clic to choose your indice and to see the other ones.

Rated 5 out of 5 stars (2)
253 users

Perfect View

Image viewer with smooth dynamic zoom, pan and rotate. View slide shows of images or files and capture page elements and tab content. Apply image filters. Save images in various formats.

Rated 4 out of 5 stars (8)
1,639 users

Hide Local Folders Requires Restart

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

Rated 4 out of 5 stars (19)
8,184 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 (30)
4,313 users

Menu On Top (SuperMenu Avatar)

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 (3)
1,225 users

Stylish-Custom Requires Restart

custom additions to Stylish extension

Rated 5 out of 5 stars (3)
698 users

ColumnsWizard Requires Restart

Adds some magic to the mesasges list columns!
With this addon you can:
* Add a custom column
* Set the default columns for any new folder.
* Show hidden columns in the Conversation Tab.
* Edit a mail header value for a single message.

Rated 4 out of 5 stars (6)
1,067 users

Version Number in Add-ons Manager

[Restartless] [e10s Compatible]
Easily viewable version info in the Add-ons Manager on Firefox/Thunderbird 24.0 and later.
Also restores the add-on version number on Firefox/Thunderbird 40.0 and later.

Rated 5 out of 5 stars (2)
326 users

Auto Zoomer Requires Restart

Keep a preset zoom level across thunderbird restarts.
Usefull on High DPI screens.

Rated 5 out of 5 stars (2)
275 users


Quick access to add-on functionality: activate / deactivate, options, details, home / review / donation pages, uninstall, restart.

Rated 5 out of 5 stars (2)
240 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 4 out of 5 stars (4)
1,163 users

Color Transform

Transform the colors of entire web pages or selected elements. Combine predefined themes with basic transforms. Save transforms for specific web domains.

Rated 4 out of 5 stars (18)
2,691 users

Sender Frequency Requires Restart

Adds a custom column for Sender Frequency to the thread pane

Rated 4 out of 5 stars (3)
76 users

Squared Australis Tabs (Tb)

A small and simple extension, which replaces the curved tabs of the Australis design with squared ones, similar to Thunderbird v14 and prior.

Rated 4 out of 5 stars (3)
476 users