Firefox Beta Now Features New IonMonkey JavaScript Compiler, Built-In PDF Viewer, Retina and Touch Support

I like the built-in PDF Viewer; I wonder if Touch will work on my pen-based tablet…


Today is beta-release day at Mozilla, and the organization is launching new beta versions of Firefox for the desktop and Android. This time around, the desktop version is set to get the most interesting updates, including the new IonMonkey just-in-time JavaScript compiler, as well as support for Macs with Retina displays and W3C Touch Event support for machines with touchscreens. On Android, Firefox now offers better phishing protection and – as an opt-in – search suggestions.

IonMonkey has been a major undertaking for Mozilla. The new JavaScript compiler made its debut in the nightly releases of Firefox 18 in September, but the project had already been underway for a good year at that point. Depending on the benchmark, IonMonkey provides up to a 26 percent performance improvement over the old TraceMonkey and JägerMonkey just-in-time compilers.

Also new in this beta are Retina support for OS X 10.7 and…

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