Simple Locale Switcher Requires Restart
An easier management of the user interface language
Google Hangouts Web Messenger brings Google Hangouts right into your browser to chat with your friends.
Stylish-Custom Requires Restart
custom additions to Stylish extension
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.
A button to be able to open the profile folder, along with two buttons to create profiles, and also switch the current profile.
Open With Internet Explorer sends pages from Mozilla Firefox to Internet Explorer.
Fierr Requires Restart
Replaces the error page with a more stylish appearance with additional features.
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.
KeePass Helper Requires Restart
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.
SeaTab-X-2 Requires Restart
Adds Firefox-style tab closers into SeaMonkey.
FolderFlags Requires Restart
Allows users to edit the flags Thunderbird sets on folders.
Tabs Menu Requires Restart
Adds a Tabs menu to the main menu that lets you easily change between tabs.
Forecastfox (fix version) Requires Restart
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Now Available for: Firefox, Thunderbird and SeaMonkey!
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
WebPG for Mozilla Requires Restart
An extension which provides GnuPG/GPG/PGP related functions to Moizilla Firefox, Thunderbird and Seamonkey
Active Stop Button Requires Restart
Stop gif animation with button, context menu or Esc key
Switch tabs by scrolling with the mouse wheel in the tab bar.
Remember Mismatched Domains Requires Restart
The Remember Mismatched Domains extension for Firefox and Thunderbird adds a "Don't warn me again about this certificate for this domain" checkbox to the Domain Mismatch and Expired Certificate warning windows. When selected the domain...