Browser
Mull
Privacy-hardened Android browser based on Firefox with removed and enhanced privacy features
Mull offers a privacy-conscious alternative in the browser space, with a stronger focus on data protection than many mainstream tools.
Recommended alternatives
Who is this for?
✓ Good for you if:
- • You want a privacy-hardened Firefox for Android
- • You need completely removed
- • You want Tor Uplift privacy patches
- • You prefer F-Droid distribution (no Google Play)
- • You want JavaScript JIT disabled for security
⚠ Think twice if:
- • You need the latest browser (Mull is discontinued, consider IronFox)
- • You want desktop browser (Mull is Android-only)
- • You need site isolation (Firefox Android lacks this)
- • You want Google Play Store version
- • You need active development (project is discontinued)
Key qualities
Overview
Mull is a privacy-focused Android browser fork of Firefox, with all telemetry and data collection removed. The browser implements strict tracking protection by default, blocking trackers and scripts. Anti-fingerprinting patches reduce fingerprinting effectiveness. Mull supports Firefox extensions for additional privacy tools. The browser is fully open source and de-bloated, removing proprietary components. Mull is maintained by the DivestOS team. Note: Mull was discontinued in December 2024 but remains functional.
Privacy highlight
Firefox fork with all removed, zero , and strict protection - maximum privacy for Android users.
Quick facts
- Country:
- 🇺🇸 United States
- Pricing:
- Free
- Platform:
- Windows, Mac, Linux, Android, iOS
- Technical:
- Beginner
- :
- No
- :
- No telemetry
- :
- Yes
- Open-source status:
- Fully open source
- :
- No
- :
- Yes
Key features
- Privacy-friendly web browser with protection.
Security & encryption Click to expand
- No
- Encryption protocols
- TLS 1.2, TLS 1.3,
- Mull uses Firefox's and mechanisms, with all removed. The browser implements certificate validation through Firefox's network stack. Mull uses standard / for connections. The browser stores certificates in Firefox's certificate store. Mull implements the same security features as Firefox but without . The browser uses secure storage with isolation features. Mull maintains Firefox's security architecture while removing privacy-compromising .
- Offline support
- Yes
Telemetry & tracking Click to expand
- No telemetry
- No
- Ip no
- Third-party services
- None
- Mull collects zero data. All mechanisms from Firefox have been completely removed. No data transmission to any servers.
Jurisdiction & compliance Click to expand
- DivestOS team (independent project). No data stored on servers. All data local on user's device.
- Mull retains no data on servers. All data stored locally on device. No data transmission. Local data persists until manually deleted.
- Legal frameworks
- Independent project, no specific jurisdiction. Privacy-focused design minimizes legal exposure.
- Revenue sources
- Donations
Editorial signals Click to expand
- 80
- Trust score
- 85
- Trust breakdown (0–10)
- Encryption: 85, Audits: 70, Open source: 100, Telemetry: 100, Jurisdiction: 75, Transparency: 75, Trackers: 100
- Editorial notes
- Usability: 8, Performance: 8, Family friendly: 8
User experience Click to expand
- Signup requirements
- No account or signup required. Mull can be used immediately after installation.
- Onboarding difficulty (1-5)
- 1
- Accessibility features
- Mull inherits Firefox's accessibility features for Android. Screen reader support and keyboard navigation available.
Backup & portability Click to expand
- Yes
- Migration tools
- Mull supports Firefox extension compatibility. Manual bookmark import possible. No built-in sync functionality.
- No account recovery needed - no accounts required. Local data recovery depends on device backup.
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