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Amazon releases Fire OS 4: Adds Firefly to tablets, integrates cloud. Amazon's latest mobile operating system lands with a few new features, notably Dynamic Light Control, deep cloud integration, and Firefly product matching for tablets. By Zack Whittaker for Between the Lines |. | Topic: Amazon.
In late September 2011, Amazon announced that the tablet, scheduled for release in November, would have a 7-inch color display and cost $199. Other Kindle Fire features include: 1  Gingerbread operating system, an Android-based open source OS.  Amazon Silk mobile browser.