Add-ons
Interface Customizations
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Stylish Tools
Requires Restart
Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey
Safe for Amoled
Duplicate Tab Blocker
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.
Lightweight Themes Preview for SeaMonkey
Preview lightweight theme when hover on menuitems in Apply Theme menu.
Search Engine Quick Switcher
Switch the current search engine on the fly! Press Control + Shift + Down Arrow to switch to the next search engine or Control + Shift + Up Arrow to select the previous one.
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.
FAYT Revived
Requires Restart
Regain possesion of your good "Find As You Type" search bar in Firefox and SeaMonkey!
FlameFox 3 Rebrander
Requires Restart
Rebrand SeaMonkey as Firefox 3 (by 2008WindowsVista and a11RyanC2)
ImageBlock for seamonkey
Requires Restart
Updated version of imageblock by Hemant Vats to work with seamonkey 2.29.
Provides a fast way to disable images in web pages that's usually set by the image manager sub-menu.
Page Navigation Buttons
Adds a few buttons to help with page navigation, including Page Top, Page Bottom, Page Down and Page Up.
CuteMenus - Crystal SVG
Requires Restart
Note from Mozilla: This add-on has been discontinued. Try Menu Icons Plus instead.
Adds icons to all menus along with some other features...
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...
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 ★
Link Status
Requires Restart
Shows an icon on the status bar when the mouse cursor is over a link to a page you bookmarked or visited before. In Firefox 3.5 and later, the extension also offers an option to disable the visited link styling to reduce the risk to privacy.
Single Key Tab Switch
Requires Restart
Single Key Tab Switch provides configurable single hotkeys for switching tabs, like the 'Single-key shortcuts' feature of the Opera browser.
SeaFind - Findbar for SeaMonkey
Requires Restart
Adds the find in page toolbar (findbar) from Firefox to SeaMonkey.
Export All Certificates
Blue Essence Seamonkey Theme
Requires Restart
Dark navigator theme based on a default Classical theme and now works on Linux :)
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