Appearance and Customization

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Dybutar No Restart

Dynamic creation of bookmark-style toolbar buttons which you can customize.

Rated 5 out of 5 stars (6)
156 users

Element Inspector No Restart

Shift-RightClick any element to open it in DOM Inspector.

Rated 5 out of 5 stars (26)
2,543 users

Enhanced Priority Display

Enhanced thread pane display of message priorities.

Rated 5 out of 5 stars (5)
969 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)
3,747 users

Firesizer

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 (124)
29,312 users

Forecastfox (fix version)

Get international weather forecasts from AccuWeather.com 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 (133)
45,600 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 (17)
2,860 users

globalChrome.css

Provides global user stylesheet.

Not yet rated
63 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 (42)
10,554 users

Gravatars

Show a column with the Gravatar-picture and sender-name in email folders.

Not yet rated
38 users

Hide C. Titlebar Plus Lite

* "Maximize your content space by configuring Title-bar & floating main-menu".
* Configurable "Thunderbird" application-main-button at top-left corner!, like Firefox's one. (see sshots)
* "Close Current Tab"! as configurable Close-button action.

Rated 5 out of 5 stars (17)
605 users

Hide Local Folders

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

Rated 4 out of 5 stars (19)
5,372 users

Hide Option Pane

Provides ability to hide option panes.

Not yet rated
25 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 (88)
8,154 users

KHANDBAHALE.COM Marathi Spell Checker.

KHANDBAHALE.COM Marathi Spell Checker. World's first ever spell checker for Marathi. मराठी स्पेल चेकर
# How to Use?
= Right Click to red marked misspelled word to correct it.
- http://www.khandbahale.com/ - a free multilingual dictionary!

Rated 5 out of 5 stars (1)
11 users

ksbtechies No Restart

Displays latest ksbtehchies News in a popup widget
Get all the Latest ksbtehchies News headline with a single click.

Opens a popup widget with the latest news headlines.

Not yet rated
1 user

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)
24,734 users

Lightning Reminder Left Buttons

Tired to mistakenly press that "Dismiss All" button? Move the Lightining Reminder "Snooze all for" and "Dismiss All" buttons to the LEFT!
... and from version 2.0 you can keep them on the RIGHT, but swapped!

Not yet rated
518 users

Lightweight Themes Manager No Restart

Manage your installed personas (lightweight themes).

Rated 5 out of 5 stars (6)
13,559 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)
4,135 users