lightweight dependency free simul-display of current page info to both the console and alert box, including a quine (program that produces as output...itself)
paste in address bar and hit enter, or save as bookmark on your toolbar make sure it starts with javascript: name it whatever you want. easy!
javascript:!function $(){var bs='\n',p='origin: '+window.location.origin+bs,a='title: '+document.title+bs,g='href: '+location.href+bs,e='hash: '+location.hash+bs,i='agent: '+navigator.appVersion+bs,n='last mod: '+document.lastModified+bs,f='current: '+Date()+bs+bs,o='javascript: '+bs+'!'+$+'()',str=p+a+g+e+i+n+f+o;console.log(str);window.alert(str);}()