This module injects the Livereload javascript to the <head> area of your document so you don't need to use the browser extension version. Most of the code in this module are taken from this thread: http://processwire.com/talk/topic/4472-how-to-insert-scripts-and-stylesheets-from-your-module/
Note: in order to use this module you'd need a LiveReload watcher, eg: guard-livereload or grunt-contrib-watch.