In a world where browsing is increasingly moving to mobile, the desktop browser is in a strange state. It's still far too popular globally to ignore, but how is a company to make browsing on the desktop anything more than a mere utility? Leave it to Google. Google has just announced a tie-in with LEGO that'll allow you to build and imagine right in Chrome using WebGL technology.
The story goes as such: a Google team in Australia developed this in 2012, and just now it's being opened up to the world. The social aspects are (naturally) powered by Google+, but you can ignore all of that if you're just keen on building. As of now, the brick selection isn't incredibly vast, but it's a great time waster for those who love LEGO blocks.
The web app should work on Android as well as Chrome for Web, and you should have luck in Firefox as well. (Sorry, no IE 11 support!) Enough chatting -- head on over and start building.