IE Tab + is an enhanced version of IE Tab. It supports FF 3.5 or greater, integrates IE Tab with Adblock Plus in the IE Tab engine, and synchronizes cookies between IE and Firefox. You can easily import settings from the original IE Tab into IE Tab +
JSONovich No Restart
Pretty-prints JSON content in the browser for easy, unobtrusive viewing.
Adds metadata and sortable tags to the password manager.
Useful tools for the nightly tester.
GNotifier No Restart
Add-on for Firefox and Thunderbird. Replaces built-in notifications with the OS native notifications. It supports most Linux Desktop Environments, Windows 8.1 & 10.
Open With Opera No Restart
Open With Opera sends pages, links, tabs and images from Mozilla Firefox to Opera.
Tab Wheel Scroll No Restart
Switch tabs by scrolling with the mouse wheel in the tab bar.
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.
Stylish Sync No Restart
Sync engine for Stylish with backup / restore facility.
Gives a possibility to create custom toolbarbuttons...
Replaces the error page with a lolifox appearance with additional features.
Displays icon for user agent of received mails.
Converts text links into genuine, clickable links...
URLFilter No Restart
Block advertisement and access to adult sites
Add-ons Manager - Version Number No Restart
Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.
Restartless Restart No Restart
This 15KB restartless add-on will add a "File" -> "Restart" menu item and a ctrl/cmd + alt + r hotkey to restart Firefox or Seamonkey.
True Full Screen in SeaMonkey No Restart
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.
A modified Dorando's tool to rebind keys in Mozilla apps. It is designed to be a drop-in replacement, and will keep your old settings. (See details for upgrade instructions.)
This add-on provides the much needed feature update of Tab Duplication to Mozilla Browsers. Features Supported include Duplication of Browser Tabs, Detaching Tabs and Merging All Windows.
Adds a hostname, URL, or email account ID to the application's window name (e.g., that of Firefox or Thunderbird) to make it recognizable to password manager utilities like KeePass.