Firefox 3.1 is based on the Gecko 1.9.1 rendering engine.

Firefox 3.1a2 New Features:

• Support for the HTML 5 <video> element
• Initial support for web worker threads
• You can now drag and drop tabs between browser windows
• New selector to create areas of Aero-style “glass” in XUL
• Support for CSS 2.1 properties: ::before and ::after, and white-space:pre-line
• Support for CSS 3 properties: -moz-border-image, word-wrap: break-word, text-shadow, box-shadow and column-rule
• Performance improvements and new preference values for color management profile support

Suggested Readings:

• Firefox 3.1a2 Release Notes
• The “Firefox 3.1 For Developers” article
• Mozilla Links: Firefox 3 Alpha 2 reviewed

Download Shiretoko:

• Windows: Shiretoko Alpha 2 Setup.exe
• Mac OS X: Shiretoko Alpha 2.dmg
• Linux: shiretoko-alpha2.tar.bz2