Google Redesigned 2 Requires Restart

Ported version from Firefox to be compatible with Seamonkey 2.

A complete redesign of popular Google services, Google Redesigned changes the appearance of popular Google services.

ZenbuShiitake Requires Restart

UI Text Overrider

Provides ability to override UI elements' label, tooltip text, etc.

WebMyStyles

Style the web your way- provides a GUI that allow web users to change the look-and-feel of arbitrary web pages to something more pleasant and accessible.

Splash! (Compatibility Update) Requires Restart

Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.

No Close Other Tabs Requires Restart

Removes "Close other tabs" context menu item.

Disable About Something Requires Restart

Provides ability to disable "about:*" pages by the configuration.

Menu Editor II Requires Restart

Hides or moves menus and menu items. (Deprecated version, see below.)

ArsTechnica Single Page Article

Shows a single page containing the whole multi page article.

Disable about:config Requires Restart

Disable about:config feature of Firefox and Thunderbird.

globalChrome.css Requires Restart

Provides global user stylesheet.

Dog Ears Requires Restart

Mark important parts of a webpage to easily relocate them.

Autohide Tabbar Requires Restart

This extension auto-hides the tab bar.

IMEStatus Requires Restart

Show IME status by input/textarea/textbox background color.

Pic Zoom Requires Restart

Zoom in and out of any image on a page

About Home Themer

Enables theming of the About:Home page by providing a simple redirect

xultray for gecko 1.9.2 Requires Restart

Show xul application (gecko 1.9.2 based) in system tray. supports Firefox 3.6 / 3.7 , Thunderbird 3.1

xultray for gecko 1.9.1 Requires Restart

Show xul application (gecko 1.9.1 based) in system tray. supports Firefox 3.5, Thunderbird 3.0.

PageTweak - Ad Blocker, Video Downloader, Translator...

The Ultimate Webpage Enhancer! Instantly add many tweaks to any webpage including: Ad block, flash block, video download, remove delays, tooltip translation, link checker, rounded corners, auto pagerize, and more. A must have for all web users.

HashColouredTabs+ Requires Restart

Improves tab identification by providing a small colored icon for any site which doesn't have its own 'site icon'.
★ 'favicon' now also shown in history and bookmarks ★