Firefox vs Zen Browser Comparison
| Feature | ||
|---|---|---|
| Overview | ||
| Rating | 6.7 | 5.2 |
| Established | 2004 | 2024 |
| Platforms |  Windows macOS Linux AndroidiOS | WindowsmacOSLinux |
| Privacy | ||
| Source code | Fully open source | Fully open source |
| Telemetry | On unless you opt out | On unless you opt out |
| Anti-fingerprinting | Basic | Basic |
| Ad/tracker block built-in | No | No |
| End-to-end encrypted sync | Yes | Yes |
| Independent security audit | None on record | None on record |
| Technical | ||
| Engine | Gecko | FirefoxShow detailsHide detailsTracks upstream Firefox releases within 0-72 hours of release, plus Firefox Release Candidate builds about a week early on the separate Twilight channel. |
| Default search | Google/Yandex/Baidu | |
| Built-in VPN/proxy | Yes | No |
