Add-ons
Top-Rated Extensions
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Irvine ContextMenu
Stylish Sync
BBCodeXtra
Requires Restart
(Sorry, no plans to port this add-on to Webextensions)
BBCodeXtra is an extension, compatible with Mozilla FireFox (up to 57) and Seamonkey, which adds to the context menu new commands to insert BBCode/Html/XHtml codes in an easy and fast way...
Quote Colors
Requires Restart
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
AutoProxy-ng
Requires Restart
This is a fork of AutoProxy, which can run the latest version of Firefox.
True Full Screen in 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.
DownThemAll!
Featured
The first and only download manager/accelerator built inside Firefox!
Fierr
Requires Restart
Replaces the error page with a more stylish appearance with additional features.
QuickPasswords
Requires Restart
Retrieve your Passwords the quick way! Never retype or display your secure passwords on screen anymore - put the password where you need it - the login form or the clipboard.
Now also includes SSO change (multi-domain pw) and Backup + Restore.
Bluhell Firewall
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
DOM Inspector
Requires Restart
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Sort and Search Customization Dialogs
Requires Restart
Sort and search for buttons in (any) toolbar customization dialog
Email This!
Requires Restart
Email This! will send your recipient the link, title, & highlighted text of the page you are viewing using GMail, Google Apps GMail, Yahoo, and Stand-Alone Mail Clients like Outlook Express, Thunderbird, & More!
Mouse Gestures Suite
Requires Restart
Mouse gestures for SeaMonkey & Firefox: navigate & execute commands using mouse gestures (with single mouse button) and rocker gestures (by pressing 2 mouse buttons). Also: scroll wheel navigation, page scrolling, tab scrolling.
FromWhereToWhere
Requires Restart
Link suggestion: based on user's local browsing history only.
Browsing history searching: list the pages from where you visited one page, and all the other pages you visited from those pages. Keywords searching, Scrapbook support, naive sharing.
Spanish (Spain) ChatZilla
UnMHT
UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.
Return Receipt Toolbar Button
Requires Restart
Allow you to add a Return Receipt button to mail compose window toolbar.
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