Icons are symbols that can convey a ton of information and really help people comprehend directions, signs, and interfaces. Its important that we create and use them so that they can reach the largest amount of people possible.
The negation pseudo-class, :not, can be incredibly useful. It allows us to target elements based on what attributes they don't have, rather than what they do. This helps us avoid writing extra, increasingly specific, rules in an attempt to override previous ones.
Until we have Retina displays everywhere, we’re going to have to live with antialiasing techniques. The problem is that computers are terrible at doing it automatically. Because the computer doesn’t know what is in the resized image, it doesn’t know where to optimize using half-pixels.
Mozilla is working on browser prototypes that look and feel almost nothing like the current Firefox. The premise for these experiments couldn’t be simpler: what we need a browser to do for us —both on PCs and mobile devices — has changed a lot since Firefox 1.0, and we’re long overdue for some fresh approaches.