The built-in PDF viewer on Firefox 19 means users would not have to worry again concerning vulnerabilities associated with third-party plug-in when viewing PDFs, as the plug-ins come with proprietary closed source code that may pose security risks.
The native PDF viewer on Firefox 19 is developed using HTML5, allowing secured and familiar interface with the browser. Additionally, the open source API means that it can run on any platform: PCs, tablet and smartphones.
Firefox 19 for Android also comes spotting new features: additional ARMv6 support and Firefox integration with Google search widget, making it possible to launch the browser direct from the home-screen through the Google search widget.
Firefox 19 beta is currently available for download for both: Desktop and Mobile
for those who wish to have a spin at what's coming.