Firefox

From Rosetta Code
Firefox is an implementation of JavaScript. Other implementations of JavaScript.
Firefox is an implementation of HTML. Other implementations of HTML.

Firefox is a web browser from the Mozilla Corporation which is often used to interpret and edit (with an add-on) JavaScript. It uses the SpiderMonkey JavaScript engine. It is considered a rival to Chrome, another popular browser created by Google, and its other derivatives, collectively known as Chromium-based browsers.