There's a little trick going around that lets you edit any ... enter: javascript:document.body.contentEditable='true'; document.designMode='on'; void 0 You'll remain on the same page, but you ...

The same applies to CSS and JavaScript code, which is contained in HTML ... You can view the HTML templates directly in the editor, highlight the interesting elements on a page and explore the ...

Firefox's new Scratchpad is different from Firefox's other JavaScript dev tools in that it is just, as the Mozilla Blog puts it, "a text editor that knows how to run JavaScript." Scratchpad gets ...