User Experience - The enhancements to Firefox provide the best possible browsing experience on the Web. The new Firefox smart location bar, affectionately known as the "Awesome Bar," learns as people use it, adapting to user preferences and offering better fitting matches over time.
Performance - Firefox is built on top of the powerful new Gecko platform, resulting in a safer, easier to use and more personal product.
Security - Firefox raises the bar for security. The new malware and phishing protection helps protect from viruses, worms, trojans and spyware to keep people safe on the Web.
Customization - Everyone uses the Web differently, and Firefox lets users customize their browser with more than 5,000 add-ons.
Other Features :
-Silent, background updates
-Support for SPDY networking protocol v3
-WebGL enhancements, including compressed textures for better performance
-Localization in Maithili (see all available locales)
-Optimized memory usage for add-ons
-JavaScript debugger integrated into developer tools
-New layout view added to Inspector
-High precision event timer implemented
-The CSS word-break property has been 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 <audio> and <video> elements now support the played attribute
-The <source> element now supports the media attribute
-Focus rings keep growing when repeatedly tabbing through elements (720987)
