environment.greasemonkey.js

gistfile1.js

connect(grobal, 'environment-load', function(){
	var gm = Cc['@greasemonkey.mozdev.org/greasemonkey-service;1'];
	if(gm){
		gm = gm.getService().wrappedJSObject;
		addBefore(gm, 'evalInSandbox', function(){
			for(var i=0, len=arguments.length ; i<len ; i++){
				var arg = arguments[i];
				if(typeof(arg) == 'object'){
					arg.GM_addStyle = function(){
						alert('patched');
					};
					return;
				}
			}
		});
	}
});