These are GreaseMonkey user-scripts. QUICKSTART: 1. install/activate GreaseMonkey extension 2. mkdir %FIREFOX_PROFILE_DIR%/gm_scripts/ MORE INFO: 1. GreaseMonkey Homepage: http://www.greasespot.net/ 2. GreaseMonkey Wiki: http://wiki.greasespot.net/ 3. Dive into GreaseMonkey: http://diveintogreasemonkey.org/toc/ 4. GreaseMonkey scripts repository: http://www.userscripts.org/