Opera vs Waterfox
| Opera | Waterfox | |
|---|---|---|
| Free plan | Yes | No |
| Free trial | Yes | No |
| Paid from | $0.33/mo | — |
| Open source | No | Yes |
| Platforms | Android, extension, iOS, Linux, macOS, Web, Windows | Windows, macOS, Linux, Android |
| Free plan | Yes | Yes |
| Supported platforms | both | both |
| Browser engine | chromium | gecko |
| Built-in ad blocking | Yes | Yes |
| Extension support | both | — |
| Cross-device sync | Yes | Yes |
| Tracking protection | — | advanced |
| Open source | — | Yes |
Both are listed in Best Web Browsers. On Specifiction, Opera scores higher on our published basis.