Mozilla released the first developer milestone of Firefox codenamed “Namoroka Alpha 1,” which’s built on pre-release version of the Gecko 1.9.2 platform, and forms the core of rich internet applications such as Firefox. This Alpha of Namoroka / Gecko 1.9.2 introduces several new features: Compositor (Phase 1), which moves Gecko to using one native widget per top-level content document, Chromedir attribute has been replaced with a pseudoclass, Several new CSS3 properties including background size and gradients for background images, Speed improvements to the TraceMonkey JavaScript engine, Startup and responsiveness improvements throughout the application

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