Accelerometers are most often found in SmartPhones and Mobile Devices. It is finding its way into Netbooks and Laptops as well. To take advantage of this nice gadget, Firefox is adding an API that will detect the screen orientation and pass it on to the Webpage to do whatever it wants to with it.
Firefox developers are planning to bring some very productive changes in the next version of their mobile browser, Fennec 2.0. This upcoming browser will support Hardware accelerated rendering and out of process web content.