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Firefox logo

Firefox

Open-source browser with best-in-class developer tools.

Web BrowserFreeBeginner

About Firefox

Firefox is Mozilla's open-source web browser available for Windows, Mac, Linux, iOS, and Android, built on the Gecko rendering engine independently of Google's Chromium project. Its developer tools include a CSS Grid and Flexbox inspector, accessibility checker, JavaScript debugger, network monitor, and multi-account containers for isolating sessions per website or client. Firefox's Enhanced Tracking Protection blocks third-party trackers, fingerprinters, and cryptominers by default. As the only major browser engine not based on Chromium, Firefox is essential for cross-browser testing and for developers who want their sites to work outside the Blink rendering engine. It is the preferred browser for frontend developers who value privacy and want the most complete set of built-in developer tools.

Best for

Best for developers who want powerful built-in DevTools and a privacy-respecting alternative to Chromium-based browsers.

Platforms

WindowsMacLinuxIosAndroid

Use Cases

Solo IndieSide ProjectContent Creation

Traits

Offline CapablePrivacy FriendlyActive DevelopmentOpen Source

Related Web Browser tools

All alternatives →
Arc logo
Arc

A reimagined browser built around how you actually work.

Web BrowserFree

Arc is a web browser developed by The Browser Company, available on Mac, Windows, and iOS, that reimagines the browser interface around productivity and focus.

WindowsMacIos
Brave logo
Brave

Privacy-first Chromium browser that blocks ads by default.

Web BrowserFree

Brave is a privacy-focused web browser built on Chromium and available for Windows, Mac, Linux, iOS, and Android.

WindowsMacLinux+2
Chrome logo
Chrome

Google's fast, dominant browser with the widest extension ecosystem.

Web BrowserFree

Google Chrome is the world's most widely used web browser, available for Windows, Mac, Linux, iOS, and Android, built on the open-source Chromium project and the Blink rendering engine.

WindowsMacLinux+2
Edge logo
Edge

Microsoft's Chromium browser with built-in productivity tools.

Web BrowserFree

Microsoft Edge is a web browser built on Chromium, available for Windows, Mac, Linux, iOS, and Android.

WindowsMacLinux+2
Safari logo
Safari

Apple's energy-efficient browser, essential for iOS testing.

Web BrowserFree

Safari is Apple's native web browser built on the WebKit rendering engine, available on Mac and iOS.

MacIos
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