Mozilla has released new beta versions of its Firefox browser, with an improved JavaScript engine for desktops, Retina display support for Macs, and optional search suggestions for Android.
The Firefox 18 beta is available through Mozilla's website for desktops, and through Google Play for Android. Keep in mind that the desktop beta replaces any stable release you've installed, while the Android beta runs in tandem.
According to Mozilla's own benchmark testing from September, the new IonMonkey JavaScript engine was 20 percent faster than Firefox 17 in one test and 7 percent faster in another. It also runs on a new architecture that makes future JavaScript research easier.
Desktop version's minor improvements

For desktops, the new Firefox beta has some other minor improvements, such as a way to disable insecure content on HTTPS websites, improved responsiveness for proxy users, performance improvements when switching tabs, and preliminary support for WebRTC, an open framework for real-time communications such as voice and video chat.
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