Mozilla Firefox

Mozilla Firefox is ranked #1 of 148 in web browsers on Freedom251, made by Mozilla Firefox (United States). It runs on Android, Browser extension, iOS, Linux, macOS, Web, Windows. There is a free plan.

Mozilla Firefox plans and pricing

All plans

Firefox Free Standard browser · Windows, macOS, Linux, iOS and Android downloads firefox.com · 29 Sept 2026

Compared on web browsers

Free plan: Yes
Supported platforms: both
Browser engine: gecko

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9.1

Mozilla Firefox

Built-in ad blocking: Yes
Tracking protection: standard
Extension support: own_store
Cross-device sync: Yes
Open source: Yes
Product: Firefox is a web browser that Mozilla describes as fast, private and useful across devices.
Cookie protection: Total Cookie Protection isolates cookies so they cannot follow users across websites.
AI tools: Firefox lets users access multiple AI chatbots from one place and choose whether to use them.
Tab Groups: Tab Groups organize open tabs by project, mood or task.
Sync: A Mozilla account can sync Firefox bookmarks, passwords and open tabs across devices.
Extensions: Firefox extensions add browser features and tools, with thousands of free extensions available through addons.mozilla.org.
Privacy: Firefox's privacy notice says browsing history, form data, temporary files and cookies are processed on the device unless the notice says otherwise.
On-device AI: Firefox's automated translation and PDF alt-text suggestions use downloaded small language models locally, and page content, PDFs, images and tab URLs are not sent to Mozilla for those features.
Security: Firefox uses Google Safe Browsing to protect against malicious downloads and phishing attacks, and validates web pages and technical data with certificate authorities.
Price from: Free

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Where it ranks on Freedom251

Best Web Browsers in 2026#1 of 148
Best Privacy Browsers in 2026#14 of 32
Best Mobile Browser Software in 2026#1 of 32

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Sources

mozilla.org/en-US/about/legal/terms/firefox/· checked 21 Sept 2026
firefox.com/en-US/features/· checked 29 Sept 2026
mozilla.org/en-US/firefox/features/· checked 29 Sept 2026
firefox.com/en-US/features/add-ons/· checked 29 Sept 2026
mozilla.org/en-US/privacy/firefox/· checked 29 Sept 2026
support.mozilla.org/en-US/products/firefox· checked 29 Sept 2026
firefox.com/en-US/download/all/· checked 29 Sept 2026
firefox.com/en-US/· checked 28 Sept 2026