The first developer milestone of the next release of Firefox - code named Shiretoko Alpha 1 - is now available for download. Shiretoko is built on pre-release version of the Gecko 1.9.1 platform, which forms the core of rich internet applications such as Firefox. Please note that this release is intended for developers and testers only.

This Alpha of Shiretoko / Gecko 1.9.1 introduces several new features:

• Web standards improvements in the Gecko layout engine
• Text API for the <canvas> element
• Support for using border images
   
• Support for JavaScript query selectors
• Several improvements to the Smart Location Bar
• A new tab switching behavior