Mozilla Add-ons - Download Firefox extensions and themes. They’re like apps for your browser. They can block annoying ads, protect passwords, change browser appearance, and more.
Extensions switcher - Menu for quick extensions control
Addoncrop - Extends the functionality of your web browser
Extensions Manager (aka Switcher) - Light popup manager to enable, disable, uninstall extensions, applications quickly and easy.
Wiinkz - Replaces your default New Tab with your favorite theme.
Chrome Extension Downloader - Chrome Extension Downloader is the name of a website dedicated for downloading and Chrome extensions.