Highlights of Mozilla Firefox 18.0 include faster JavaScript performance, thanks to the IonMonkey compiler; initial support for WebRTC; implemented CSS3 Flexbox; implemented a new HTML scaling algorithm for better image quality when browsing websites; better tab switching performance; support for the new window.devicePixelRatio DOM property; support for @supports; startup time improvements, thanks to smart handling of signed extension certificates; support for W3C touch events, replacing MozTouch events.