Firefox 15 was released on August 28, 2012, with a "Responsive Design View" developer tool,[57] adds support for the Opus audio format, and adds preliminary native PDF support (disabled by default).[58]
Firefox 15 was released on August 28, 2012, with a "Responsive Design View" developer tool,[57] adds support for the Opus audio format, and adds preliminary native PDF support (disabled by default).[58]