Prevent duplicate tabs. Allow only one tab for a url. If you click a link that is already opened in a tab, then existing tab would be focused instead of opening a new tab. This works even across firefox windows.
Adds toolbar buttons for each restartless add-on (including user scripts and plugins) to toggle its enabled state.
MailNews Status Icons Requires Restart
Adds status icons for replied and forwarded messages to SeaMonkey MailNews.
FlameFox 3 Rebrander Requires Restart
Rebrand SeaMonkey as Firefox 3 (by 2008WindowsVista and a11RyanC2)
GNOMErunner Options Requires Restart
Allows to customize GNOMErunner theme
Blue Essence Seamonkey Theme Requires Restart
Dark navigator theme based on a default Classical theme and now works on Linux :)
Preview lightweight theme when hover on menuitems in Apply Theme menu.
MonkeyMenu Requires Restart
MonkeyMenu brings some of the features of the MenuX Firefox extension to the Seamonkey browser. You can add about 29 buttons to the Seamonkey user interface, collapse any toolbar, add/remove search engines, have your font zoom size reloaded, and...
Shift+LeftClick XUL Requires Restart
This simple addon has only this functionality, nothing else: it opens links in a new active tab with Shift+LeftClick (left mouse button click).
Better use https://addons.mozilla.org/ru/firefox/addon/shiftleftclick-opens-links-in-/ for FireFox.
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.
SeaFind - Findbar for SeaMonkey Requires Restart
Adds the find in page toolbar (findbar) from Firefox to SeaMonkey.
Folder Pane Cell Selection Type Requires Restart
Since 20070806 the MailNews folder pane has switched from its previous cell text selection to the full row selection which the Mozilla Suite used to use.
Email this page Requires Restart
Simple SeaMonkey Email this page button
New Tab Button 2 Requires Restart
Provides a new tab button for the navigation toolbar.
Add Search Engines for SeaMonkey Requires Restart
Add missing search-engine detection to SeaMonkey