Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.
Open With Opera sends pages, links, tabs and images from Mozilla Firefox to Opera.
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
Adds buttons to toggle the using the default page colors and fonts, and the page defined colors and fonts.
Adds a few buttons to help with page navigation, including Page Top, Page Bottom, Page Down and Page Up.
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.
Dorando keyconfig Requires Restart
A modified Dorando's addon to rebind keyboard shortcuts. It is designed to be a drop-in replacement, keeping your old settings. (See details for upgrade instructions.)
FlameFox 3 Rebrander Requires Restart
Rebrand SeaMonkey as Firefox 3 (by 2008WindowsVista and a11RyanC2)
New Tab Button 2 Requires Restart
Provides a new tab button for the navigation toolbar.
FAYT Revived Requires Restart
Regain possesion of your good "Find As You Type" search bar in Firefox and SeaMonkey!
This extension enables true full screen mode in SeaMonkey for HTML5 video players, slide-shows, etc. and also for full screen invoked manually with the F11 key.
Menu Wizard Requires Restart
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
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.
Want to change from one language to another? Zing! and the locale is switched.
SeaTab-X-2 Requires Restart
Adds Firefox-style tab closers into SeaMonkey.
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.
Preview lightweight theme when hover on menuitems in Apply Theme menu.
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.