The Firefox Nightly beta makes these calls run faster than non-in-lined JavaScript-to-JavaScript function calls. Calls have been optimized from JavaScript to WebAssembly and vice versa.

JavaScript creator and Mozilla CTO Brendan Eich ran the SunSpider JavaScript benchmarks against Chrome and the latest TraceMonkey-enabled Firefox build, which includes some recent improvements.

Mozilla has just rolled out OdinMonkey, a new module for Firefox's JavaScript engine that promises to speed up JavaScript execution beyond your wildest dreams. If you were drawn to Chrome because ...

Mozilla is leveraging an impressive new optimization technique to bring a big performance boost to the Firefox JavaScript engine. The code was merged today (but is not yet ready to be enabled by ...

JSTerm, an experimental Firefox add-on for JavaScript developers, has hit version 2.0. The JSTerm Firefox add-on — not to be confused with the HTML5 Telnet Emulator by the same name — adds a ...

In the case of Firefox 9, the type inference engine seems to produce up to 30% faster JavaScript execution. It varies from benchmark to benchmark, but the performance improvement is unmistakable.

Firefox's new Scratchpad is different from Firefox's other JavaScript dev tools in that it is just, as the Mozilla Blog puts it, "a text editor that knows how to run JavaScript." Scratchpad gets ...

Firefox's graphics and JavaScript performance should improve with new Mozilla projects. Don't expect results by Firefox 5's June release, though.

Firefox 3.5.1 fixes a JavaScript vulnerability in version 3.5 that exposed users to so-called drive-by attacks.

Andreas Gal, an engineer who helped speed up the Firefox browser at a crucial moment and then helped launch the Firefox OS project, has been promoted to Mozilla's new chief technology officer.