The release of Firefox 72.0.1 came just one day after the newest version of the browser rolled out and fixes a type confusion bug in the IonMonkey JavaScript JIT (Just-in-Time) compiler of ...

In an effort to keep Firefox competitive with commercial browsers and handle the ever-heavier burden that interactive webpages put on browsers’ scripting engines, Mozilla is working on a new ...

Mozilla has released Firefox 18 beta for Windows, Mac, and Linux. New features include faster JavaScript compiling via IonMonkey and Retina Display support.

That is where the Javascript JIT or Just-in-Time compiler comes in, which is now a standard feature in almost all Javascript engines used by web browsers, including Chromium's V8 engine.