PrivacyFocus

Firefox

88/100

The leading open-source browser from Mozilla, offering extensive privacy customisation and strong tracking protection.

FactorScore
privacy
92
security
88
usability
84
features
86
value
92
Founded
2002
Headquarters
San Francisco, USA
Starting Price
0
Free Tier
Yes

Pros

  • Most customisable privacy settings of any mainstream browser
  • Total Cookie Protection isolates cookies per site
  • Container tabs for separating browsing contexts
  • Backed by the non-profit Mozilla Foundation
  • Extensive extension ecosystem including uBlock Origin

Cons

  • Requires manual configuration for maximum privacy
  • Slightly slower than Chromium-based browsers on some benchmarks
  • Some websites optimised for Chrome may not render perfectly
  • Mobile version has limited extension support compared to desktop

Platforms

WindowsmacOSLinuxiOSAndroid

Overview

Firefox is developed by the Mozilla Foundation, a non-profit organisation dedicated to keeping the internet open and accessible. It is the only major browser not based on Google's Chromium engine, making it a critical counterweight to Google's dominance of web standards. Firefox offers the most granular privacy controls of any mainstream browser, from Enhanced Tracking Protection to the about:config advanced settings.

Total Cookie Protection, enabled by default in Strict mode, creates a separate cookie jar for every website, preventing cross-site tracking without breaking website functionality.

Privacy Customisation

Firefox's about:config page provides access to hundreds of privacy-related settings that are not exposed in the standard settings interface. The privacy.resistFingerprinting flag standardises browser characteristics to reduce fingerprinting. Container tabs let you isolate different browsing contexts, keeping work, personal, and banking activities completely separate. DNS over HTTPS encrypts your domain lookups to prevent ISP snooping.

Who Should Use It

Firefox is the best choice for users who want maximum control over their browser's privacy behaviour. It rewards investment in configuration with privacy protection that no other mainstream browser can match. If you are willing to spend thirty minutes configuring settings and installing a few extensions, Firefox provides the strongest privacy foundation available.

Recommended VPNs

Layer your privacy. Pair this tool with a trusted VPN.

Recommended Password Managers

Secure your accounts with a dedicated password manager.