html css js client-side editing

is there a way to modify html/css/js code on certain site client-s开发者_运维问答ide?? For example, Google Chrome Developer Tools allows editing css properties and values, after pressing enter it shows modifications on screen. i would like to edit css/js files as well.

Is there a tool (maybe extension) which allows it??

Thanks in advance!!

P.S.: i tried to save page, but that doesn't help...(it's total mess. too many dependencies on site's folders...) .

Firebug it is what you need. Exist an addon extension for Firefox and Chrome.

Another possibility it is using a more permanent modification to keep in place (like for example I hate the new twitter redesign, and I am loading a my preference in styles) Stylish

If you look for permanent editing of files as JS have you tried greasmonkey for FF?

And just to show off the power of HTML5 http://html5demos.com/contenteditable http://annevankesteren.nl/test/contenteditable-style.htm

You can look at http://www.webputty.net/ too, but this is specific to css only (as far as I know).