As with every major release of Firefox since 1.0, I’ve had the privilege of working with Mozilla on their website updates for the new Firefox 3.5 release.
If you care about web browsers, you already know why it’s awesome, and if you don’t care about web browsers, all you need to know is that it’s better.
Even though there are loads of significant new features (audio/video, downloadable fonts, big performance improvements), my favourite feature so far is stupidly simple. When you View Source on a page, you can now click on the links to CSS and JavaScript files to view them right in the source viewer. This had made my life 0.000.1% better, which isn’t bad for a web browser.