Appearance and Customization


Forecastfox (fix version)

Get international weather forecasts from and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.

Now Available for: Firefox, Thunderbird and SeaMonkey!

Rated 5 out of 5 stars (150)
55,519 users

Noia Fox options

Options manager and fixes for Noia Fox theme 3.x.x

Rated 5 out of 5 stars (13)
47,141 users


Allows you to resize the window to specific dimensions.

NOTE: Users of Firefox 29 and above must install "The Addon Bar" extension to use this, as Firesizer uses the add-on bar that has been removed in Firefox 29.

Rated 4 out of 5 stars (127)
32,775 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 (7)
31,395 users

Color Folders

Color your Folder Treeview Icons!

Rated 4 out of 5 stars (123)
31,170 users

Menu Wizard

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 (134)
25,720 users

Tag Toolbar

Add toolbar for toggling tags.

Rated 4 out of 5 stars (40)
19,261 users

Simple Locale Switcher

An easier management of the user interface language

Rated 5 out of 5 stars (7)
15,383 users

Lightweight Themes Manager No Restart

Manage your installed personas (lightweight themes).

Rated 5 out of 5 stars (6)
14,339 users

Simple Timer

A timer/clock residing in the toolbar.

Rated 5 out of 5 stars (106)
13,557 users

GNotifier No Restart

Add-on for Firefox and Thunderbird. Integrates Firefox's notifications with the OS's native notification system. It supports most Linux desktops and Windows 8.

Rated 5 out of 5 stars (46)
11,940 users


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 (96)
9,604 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 (17)
8,650 users

Hide Local Folders

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

Rated 4 out of 5 stars (19)
7,350 users

Personas Shuffler No Restart

Change your Personas theme on each browser load.

Rated 5 out of 5 stars (12)
5,715 users

OutlookAlike BETA

Makes Thunderbird looking like Outlook.

Rated 4 out of 5 stars (26)
5,048 users

Mark All Read Button

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

Rated 4 out of 5 stars (29)
4,985 users

Extra Format Buttons

Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.

Rated 5 out of 5 stars (5)
4,921 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 (23)
4,179 users

G-Hub Lite

Add Google Tabs to Thunderbird! Services supported: Voice, Calendar, Drive, Docs, Sheets, Slides, Hangouts, Plus, Photos, Contacts, News, Maps, & many more. Need Google Apps? Check out G-Hub Pro:

Rated 3 out of 5 stars (17)
3,633 users