Addy Osmani recounts his experience of creating cross-browser polyfill visibly.js and provides plenty of top tips on how you can create your own HTML5 polyfills, while avoiding the headaches developers often run into when coding them for the first time
Mozilla's Louis-Rémi Babé rounds up the best Firefox add-ons for web designers and developers and explains how to use them to learn more about HTML, CSS and JavaScript, add an FTP client to your browser and more
As new platform versions get released more and more quickly, are users keeping up? Zeh Fernando, a senior developer at Firstborn, looks at current adoption rates and points to some intriguing trends
With a wealth of online tools at your disposal, it’s easier than ever to build a bespoke web design toolbox, tailored to your every need. The Standardistas offer some ideas
Bruce Lawson, open web standards evangelist for Opera, looks at some nifty new browser technologies that are not part of HTML5, including WebGL and SVG
This month, Mark Penfold's round-up of the best new tools ranges from cutting-edge experiments to down-to-earth utilities. Give them a try: they're all free
