Back in 2012, Mozilla launched Thimble, an online code editor for teaching the basics of HTML, CSS and JavaScript. Over time, though, things got pretty quiet around the project as other browser ...

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 ...

It allows you to edit PHP, HTML, CSS and JavaScript files, and it highlights the syntax and provides hints for tags, functions and their parameters. This editor deals with files that contain mixed ...