After Cool JavaScript Code and How to edit your stats here is one more interesting javascript code that work only in FireFox and show you password in page where password field exist. Just copy/paste this in address bar:
Can be usefull in some case but it's much more dangerus 
So start using my favorite on objectively best browser on world: Opera
javascript:%20var%20p=r();%20function%20r(){var%20 g=0;var%20x=false;var%20x=z(document.forms);g=g+1; var%20w=window.frames;for(var%20k=0;k<w.length;k++ )%20{var%20x%20=%20((x)%20||%20(z(w[k].document.forms)));g=g+1;}if%20(!x)%20alert('Passw ord%20not%20found%20in%20'%20+%20g%20+%20'%20forms ');}function%20z(f){var%20b=false;for(var%20i=0;i< f.length;i++)%20{var%20e=f[i].elements;for(var%20j=0;j<e.length;j++)%20{if%20(h (e[j]))%20{b=true}}}return%20b;}function%20h(ej){var%20 s='';if%20(ej.type=='password'){s=ej.value;if%20(s !=''){prompt('Password%20found%20',%20s)}else{aler t('Password%20is%20blank')}return%20true;}}
So start using my favorite on objectively best browser on world: Opera

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