Mozilla firefox 15 final is now available for download from Mozilla’s FTP site. It is currently not available on the firefox official homepage but expected to be available in August 28, 2012
what’s new in this firefox 15?
Preliminary native PDF support (Aurora/Beta only)
Support for SPDY networking protocol v3
WebGL enhancements, including compressed textures for better performance
Optimized memory usage for add-ons
New layout view added to Inspector
The CSS word-break property has been implemented.
High precision event timer implemented
New responsive design tool allows web developers to switch between desktop and mobile views of sites
Native support for the Opus audio codec added
The source element now supports the media attribute
The audio and video elements now support the played attribute
Download Mozilla firefox 15