A side-by-side comparison built from catalogue data. Both offer 3 of the same listed features, including Cross-device sync, Plugins and extensions, Tracking protection.
| App |  Mozilla Firefox Independent open-source web browser with built-in tracking protection. |  Vivaldi Highly customisable browser with built-in tools like mail, calendar and tab stacking. |
|---|---|---|
| Developer | Mozilla | Vivaldi Technologies |
| Pricing | Free | Free |
| License | Mozilla Public License 2.0 | Proprietary |
| Open source | Open source: Yes | Open source: No |
| Self-hostable | Self-hostable: No | Self-hostable: No |
| Works offline | Works offline: No | Works offline: No |
| Privacy-focused | Privacy-focused: Yes | Privacy-focused: Yes |
| Windows | Windows: Yes | Windows: Yes |
| macOS | macOS: Yes | macOS: Yes |
| Linux | Linux: Yes | Linux: Yes |
| Android | Android: Yes | Android: Yes |
| iOS | iOS: Yes | iOS: Yes |
| Community rating | No reviews yet | No reviews yet |
| Likes | 0 | 0 |
| First released | Nov 9, 2004 | — |
| Categories | Web Browsers | Web Browsers |
| Features | ||
| Cross-device sync | Cross-device sync: Yes | Cross-device sync: Yes |
| Plugins and extensions | Plugins and extensions: Yes | Plugins and extensions: Yes |
| Tracking protection | Tracking protection: Yes | Tracking protection: Yes |
| Built-in ad blocking | Built-in ad blocking: not recorded | Built-in ad blocking: Yes |
| Links | ||
Feature rows list only features recorded in the catalogue. A missing check means the feature is not recorded for that app, not necessarily that it is unavailable.
