Firefox Mass Extensions Manager is a free utility for Firefox that allows you to organize, install, and search for extensions and add-ons.

It enables you to quickly view all of your installed extensions, and to disable or uninstall them just by selecting the undesired ones.

It can be used to browse other add-ons, divided by category, to filter the top and recommended extensions, search through the whole directory and, when you’ve found the extension you want, to install it with a single click.

Firefox Mass Extensions Manager can also be used to backup and restore all of your extensions with one single click.

The setup file comes in .xpi format, so if you don’t know what to do with it, just search xpi in the search form.

Link: http://www.download.com/Firefox-Mass-Extensions-Manager/…