Appearance and Customization

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Firesizer

Allows you to resize the window to specific dimensions.

Rated 4 out of 5 stars (114)
43,136 users

Lightning Calendar Tabs

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 (6)
27,071 users

Color Folders

Color your Folder Treeview Icons!

Rated 4 out of 5 stars (86)
18,402 users

Lightweight Themes Manager No Restart

Manage your installed personas (lightweight themes).

Rated 5 out of 5 stars (3)
15,950 users

Tag Toolbar

Add toolbar for toggling tags.

Rated 5 out of 5 stars (29)
13,967 users

Show All Body Parts No Restart

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

Rated 5 out of 5 stars (12)
6,083 users

No Small Text No Restart

No longer tolerate unreadable text! Set a minimum font size for all web content using a toolbar button.

Rated 4 out of 5 stars (25)
5,598 users

Personas Shuffler No Restart

Change your Personas theme on each browser load.

Rated 5 out of 5 stars (9)
4,894 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 (22)
4,109 users

HTitle

Hide title bar if window is maximized.

This extension created only for GNOME 3. It can create problems with another DE (KDE, XFCE, etc). However, you can use HTitle at your own risk (need enable "legacy" mode on settings page).

Rated 5 out of 5 stars (48)
3,814 users

ViewAbout

Enables access to various about: dialogs from the View menu.

Rated 4 out of 5 stars (12)
3,526 users

G-Hub Lite

Adds Google Tabs to Thunderbird. Services include Voice, Calendar, Drive (Docs), Contacts, Groups, News, Books, Play, Maps, Sites, Finance, Picasa, Plus. Need Google Apps? Check out G-Hub Pro: http://www.schiffner.com/index.php/software/g-hub-pro

Rated 3 out of 5 stars (16)
3,207 users

Hide Local Folders

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

Rated 3 out of 5 stars (10)
2,803 users

Priority Switcher

Change priority of the received messages from the toolbar button and the context menus...

Rated 4 out of 5 stars (16)
2,350 users

OutlookAlike BETA

Makes Thunderbird looking like Outlook.

Rated 3 out of 5 stars (12)
2,332 users

Old-style smilies

Reverts the smilies in Thunderbird to those of version 2.

Rated 4 out of 5 stars (1)
2,290 users

New Tab Button

It provide you the following functionalities:
* Open a selected message in a tab by a toolbar button
* Open a message in a tab by double-clicking its header view (disabled by default)
* Hide Lightning's Today Pane on opening a tab

Rated 5 out of 5 stars (8)
2,210 users

Search Results Sort By Date Not Relevance

Makes search results sort by "date" instead of "relevance" by default.

Rated 5 out of 5 stars (9)
2,178 users

Zoom Button for Thunderbird

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

Rated 3 out of 5 stars (6)
2,176 users

Simple Locale Switcher

An easier management of the user interface language

Rated 5 out of 5 stars (2)
2,005 users