Version History of Firefox 15.0 (Beta 2)

• NEW - Preliminary native PDF support (Aurora/Beta only)
• NEW - Support for SPDY networking protocol v3
• NEW - WebGL enhancements, including compressed textures for better performance
• CHANGED - Optimized memory usage for add-ons
• DEVELOPER - JavaScript debugger integrated into developer tools
• DEVELOPER - New layout view added to Inspector
• DEVELOPER - The CSS word-break property has been implemented.
• DEVELOPER - High precision event timer implemented
• DEVELOPER - New responsive design tool allows web developers to switch between desktop and mobile views of sites
• HTML5 - Native support for the Opus audio codec added
• HTML5 - The <source> element now supports the media attribute
• HTML5 - The <audio> and <video> elements now support the played attribute