Mozilla Firefox
Firefox is the only major browser not built on Chromium or WebKit, developed by the non-profit Mozilla Foundation with strong default tracking protection.
- Brand
- Mozilla
- Category
- Web Browsers
- Released
- 2004
- Price
- Not published
- VersusAnything Score
- 25/100
Key features
- Independent Gecko engine
- Non-profit developer
- Enhanced Tracking Protection by default
Best for users who want an independent, privacy-focused browser with full extension support.
Firefox specifications
| Rendering engine | Gecko |
|---|---|
| Developer | Mozilla Foundation |
| Open source | Yes, fully |
| Built-in ad/tracker blocking | Yes, Enhanced Tracking Protection |
| Built-in VPN | Mozilla VPN (paid, separate) |
| Extension support | Firefox Add-ons (also on Android) |
| Cross-device sync | Yes, via Mozilla account |
| Platforms | Windows, macOS, Linux, Android, iOS |
| Global market share (approx.) | 2.5% |
Score breakdown
- Overall (100%)
Scored against every browser in our database using the web browsers weighting.
Pros and cons
Pros
- Independent Gecko engine
- Non-profit developer
- Enhanced Tracking Protection by default
Cons
- Weaker overall score (25/100 within web browsers)
Compare Firefox against
Alternatives to Firefox
- Google Chrome 100/100
- Apple Safari 75/100
- Microsoft Edge 50/100
- Brave Browser 0/100
Sources
- Firefox: Mozilla official (manufacturer)
Specifications last verified: 2026-10-01. Prices are launch or official list prices in US dollars unless stated. See our sources and data policy.