(function(){
	if (!window.console || !console.firebug) {
		var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml", "group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"];
		
		window.console = {};
		for (var i = 0; i < names.length; i++) {
			window.console[names[i]] = function(){};
		}
	}
})();

if (!window.console || !console.firebug){
    var names = ["log", "debug", "info", "warn", "error", "assert", "dir", "dirxml",
    "group", "groupEnd", "time", "timeEnd", "count", "trace", "profile", "profileEnd"];

    window.console = {};
    for (var i = 0; i < names.length; ++i)
        window.console[names[i]] = function() {}
}

http://getfirebug.com/lite.html

Sometimes i forget to remove firebug console commands when debuging, which makes IE and some other browsers fail / cry.

To stop this happening use the below script from firebugx.js on the firebug lite homepage.

Stop Firebug Console Command Errors

command

JavaScript