Firefox browser add-on lets us try Firefox OS in an all-Mozilla universe

We've had the chance to experiment with early versions of Firefox OS for awhile -- just not in Firefox the browser, where you'd nearly expect it to have shown first. At least one person appreciates that seemingly natural fit. A new Firefox OS simulator add-on, r2d2b2g, lets us try Mozilla's upcoming mobile platform from within the company's own browser for everything that doesn't depend on native hardware, including the browser and Firefox Marketplace. The goal is ostensibly to let developers te...