This directory holds directories with the Firefox extension.

steps for new extension using the installExtenstion.sh
    - download extensin as name.xpi
    - use installExtension <name> <file>
    - use -E <name


each directory holds:
    - user.js  - is appended to the user.js
    - {id}.xpi - the firefox extention as the zip archive
    - {id}/    - the directory with the exteracted zip archive

    https://askubuntu.com/questions/73474/how-to-install-firefox-addon-from-command-line-in-scripts
