http://mozilla.zeniko.ch/userchrome.js.htmlRun Javascript like an extension without building a new one.zeniko's userChrome.js userChrome.js allows to easily customize Firefox through JavaScript. What
is for CSS customization, userChrome.js is for JavaScript. Simply edit the file userChrome.js (in the
as userChrome.css) and its content will be run whenever a new browser window is opened ( onLoad ).
For more detailed information visit the website, please...userChromejsFirefox Extensions