Firefox vs Vivaldi Comparison
| Feature | ||
|---|---|---|
| Overview | ||
| Rating | 6.7 | 5.9 |
| Established | 2004 | 2016 |
| Platforms |  Windows macOS Linux AndroidiOS | WindowsmacOSLinuxAndroidiOS |
| Privacy | ||
| Source code | Fully open source | Partly open source |
| Telemetry | On unless you opt out | Always on |
| Anti-fingerprinting | Basic | Basic |
| Ad/tracker block built-in | No | Yes |
| End-to-end encrypted sync | Yes | Yes |
| Independent security audit | None on record | None on record |
| Technical | ||
| Engine | Gecko | Chromium |
| Default search | Google/Yandex/Baidu | Varies by locale (Bing on mobile) |
| Built-in VPN/proxy | Yes | Yes |
