Firefox 19.0 Beta 1

# NEW
* Built-in PDF viewer
* Firefox will offer to reset the Awesomebar search provider, if it has been changed by third-party software or through about:config
# CHANGED
* Canvas elements can export their content as an image blob using canvas.toBlob()
* Startup performance improvements
# DEVELOPER
* Debugger now supports pausing on exceptions and hiding non-enumerable properties
* Remote Web Console is available for connecting to Firefox on Android or Firefox OS (experimental, set devtools.debugger.remote-enabled to true)
* There is now a Browser Debugger available for add-on and browser developers (experimental, set devtools.chrome.enabled to true)
* Web Console CSS links now open in the Style Editor
# HTML5
* CSS @page is now supported
* CSS viewport-percentage length units implemented (vh, vw, vmin and vmax)
* CSS text-transform now supports full-width
# FIXED
* Starting Firefox with -private flag incorrectly claims you are not in Private Browsing mode