Create the file “userChrome.css”; there may already be an example file that you can just rename. The important bit of this CSS file is the namespace line that tells Firefox how to use it.

Indeed, it’s the option for CSS icon scaling that will most likely have the greatest impact on developers on a day-to-day basis.

We’ve seen what it’s possible to achieve with CSS before: the Opera logo, a Safari window built inside Safari itself, a Kinetic Type video. What about Apple-related stuff though? Now we have an iPhone ...

Firefox versions 3.6 and 4 still don't fully support CSS3, so the magnifications work but not the icon bounce. While this is an interesting experiment, it also shows some of where browser-based ...

Codecademy offers some interactive lessons on HTML and CSS for free. A paid Codecademy Pro subscription – at $19.99 per month, billed yearly – gives you access to exclusive content, step-by ...

CSS look back on indie sleaze (“the best name this era has ever had,” Lovefoxxx enthuses, “it embraces the whole thing”) as perhaps the last turned on, tuned in DIY idyll.