On a related note, here are some interesting articles.
Web War 3.0 - Screen sizes
When I started working as a web developer, there was no longer a need to use the hacks from the 90s to make your website work. The marquee and blink tags where already dead. I could still see some old blogs referencing document.layers but they were on their way out. But still when I started, I had to worry very much about writing cross browser code.
CSS minifier in PHP
A while ago, I was trying to find a way to reduce the number of HTTP requests made on my pages. To make development easier, each section of the CSS is in a different file; this way, I know exactly where everything is located when I want to make changes. However, making 10 to 15 request just to get the CSS is too much overhead. It could be much better if I could combine them all into one.