The Mozilla Blog

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Major JavaScript Enhancements Make Firefox Speedy – up to 30% Faster

· Firefox, Mozilla News

Firefox for Windows, Mac and Linux has new JavaScript enhancements that make Web browsing significantly faster. The latest update to Firefox includes Type Inference which boosts JavaScript performance and allow rich websites and Web apps with lots of pictures, videos, games and 3D graphics to load and run much faster. Type Inference is a feature of the SpiderMonkey JavaScript engine that integrates with the JaegerMonkey JIT compiler to provide analysis and help generate more efficient code. Firefox with Type Inference is up to 30% speedier on JavaScript benchmarks like Kraken and V8.

Firefox for Mac OS X Lion supports two-finger swipe gestures so you can easily navigate between websites. Firefox for Mac has an enhanced look and feel that matches the Mac OS X Lion icon and application toolbar styles and makes it easier to browse the Web using multiple monitors.

Web developers will notice Firefox helps websites load much faster, especially sites that download large sets of data or use AJAX. Firefox supports chunking XHR requests, allowing websites to display content as it’s downloaded instead of waiting for the entire download to complete. For more details about the new developer capabilities in Firefox, check out the Firefox for Web developers page.

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48 responses to “Major JavaScript Enhancements Make Firefox Speedy – up to 30% Faster”

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