^{Browser Names > Firefox}

Firefox

• Developer: Mozilla
• Development Status: Active
• Released: 2004
• Platforms: Windows, macOS, Linux
• Type: Browser
• Rendering Engine: Gecko

Overview

Firefox is an open-source web browser developed by Mozilla.

Related Browsers

UAParser.js detects Firefox products, historical names, and independently maintained derivatives separately.

Firefox products and historical names

Browser	Description
Firefox	Mozilla's main Firefox browser.
Firefox Mobile	Mozilla's Firefox browser for mobile devices.
Firefox Focus	Mozilla's privacy-focused mobile browser.
Klar	The name used for Firefox Focus in German-speaking markets.
Fennec	Mozilla's former mobile browser, followed by Firefox Mobile.
Phoenix	Firefox's original project name.
Firebird	Firefox's name after Phoenix and before Firefox.

Firefox-derived browsers

These are separate projects, not official Firefox editions:

Browser	Description
Waterfox	An independently maintained Firefox fork.
LibreWolf	A community Firefox fork focused on privacy and security.
PaleMoon	An independent browser that began as a Firefox fork.
IceCat	GNU's Firefox-based browser and rebrand.
Iceweasel	Debian's former rebranded Firefox package.
Swiftfox	A Firefox-based build optimized for Linux.

History

Firefox started as Phoenix in 2002 and was later called Mozilla Firebird. Mozilla renamed it Firefox with version 0.8 in February 2004 to avoid confusion with another open-source project.

User-Agent Examples

Windows

Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20120716 Firefox/15.0a2

macOS

Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:100.0) Gecko/20100101 Firefox/100.0

Linux

Mozilla/5.0 (X11; Linux x86_64; rv:80.0) Gecko/20100101 Firefox/80.0 AppName/1.0

Code Example

import { UAParser } from 'ua-parser-js';
import { BrowserName } from 'ua-parser-js/enums';

const parser = new UAParser();
const ua = 'Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20120716 Firefox/15.0a2';

const browser = parser.setUA(ua).getBrowser();

console.log(browser);
// {name: "Firefox", version: "15.0a2", major: "15"}

console.log(browser.is(BrowserName.FIREFOX));
// true