Welcome to SeaMonkey Add-ons.
Add extra features and styles to make SeaMonkey your own.Close
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Classic Toolbar Buttons No Restart
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.
Beta builds on versions page!
Theme Font & Size Changer No Restart
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
Old Default Image Style No Restart
Restores the default image style used for top-level images in previous versions of Firefox.
Stylish Sync No Restart
Sync engine for Stylish with backup / restore facility.
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
Adds Firefox-style tab closers into SeaMonkey.
Add-ons Manager - Version Number No Restart
Restores add-on version number inside Add-on Manager for latest builds of Firefox, Thunderbird and Seamonkey.
This extension allows to open links in new tabs with right-click directly and using “long” left-click.
This is very useful for touchpads on notebooks and for mice without middle button.
F.B. Purity - Cleans Up Facebook No Restart
F.B. Purity hides the ads, app spam and other annoying clutter from your facebook news feed, lets you increase the font size, change colours plus many more features and generally makes Facebook a lot less annoying to use.
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.
Drag-Select Link Text No Restart
Select link text with easy drag gestures.
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!
Replaces the error page with a lolifox appearance with additional features.
Black background and white text No Restart
Makes black background and white text on every page
Replaces the error page with a more stylish appearance with additional features.
Lightweight Themes Manager No Restart
Manage your installed personas (lightweight themes).
Speed Start No Restart
Speed Dial & Start Page with flexible layout for fast access to sites via visual bookmarks
Make the “Received” column in IMAP folders show when messages were actually received.