LibreWolf vs Firefox
Quick answer: LibreWolf aims to remove or harden settings in Firefox that could lead to telemetry or data leakage. It keeps core Firefox compatibility but changes defaults. Use LibreWolf if you prefer a privacy-first preset; use official Firefox for the mainstream release cadence, telemetry options, and vendor support.
At a glance
This page compares the unofficial LibreWolf builds with the upstream Mozilla Firefox, focusing on Windows: telemetry, update models, extension compatibility, and release differences. Both are derived from the same codebase, but LibreWolf applies different default configurations.
Quick Comparison Table
| Aspect | LibreWolf | Firefox (Mozilla) |
|---|---|---|
| Telemetry | Removed or disabled by default in LibreWolf builds. | Telemetry present by default but can be opted out via settings. |
| Default prefs | Hardened defaults (privacy-first tweaks, reduced fingerprinting). | Balanced defaults for compatibility, performance and telemetry features. |
| Updates | Managed by project builds; can be installed via installer/winget. | Official auto-update services and rapid ESR/Release cadence maintained by Mozilla. |
| Extension compatibility | High — almost full compatibility with Firefox add-ons. | Highest compatibility; official WebExtensions support. |
| Support & provenance | Community-maintained — users should verify builds and checksums. | Official vendor support, security advisories and release notes from Mozilla. |
| DRM | Widevine may be disabled by default; manual steps required. | Widevine integration available and supported through official channels. |
Why LibreWolf exists
LibreWolf provides a pre-configured, privacy-reduced version of Firefox for users who do not want to manually tweak dozens of preferences. It’s useful for privacy-conscious users, security-focused setups, and contexts where telemetry should be avoided.
Risks & trade-offs
- Security updates: while LibreWolf tracks upstream fixes, users must ensure they get timely updates — use winget or monitor releases.
- Compatibility: some upstream features or telemetry-dependent services may be impacted by changed defaults.
- Support: LibreWolf is community-driven; for enterprise-grade vendor support, prefer official Firefox.
Recommended users
- Privacy enthusiasts who prefer a pre-hardened browser without telemetry.
- Users who want Firefox compatibility but with privacy-first defaults.
- System administrators deploying stricter privacy configurations without manual profile changes.
Migration and verification
If you move from Firefox to LibreWolf, export bookmarks and sync critical data. Verify installer checksums on the Download page and follow update instructions on Install.