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Browser

Mull

Privacy-hardened Android browser based on Firefox with

removed and enhanced privacy features

Privacy score 80 Free Technical: Beginner Open source
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Mull is a privacy-friendly web browser with

protection. It helps you keep more control over your data.

🔀

Recommended alternatives

LibreWolf Firefox Mullvad Browser
Windows Mac Linux Android iOS

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

✓ Open source ✓ No telemetry ✓ Privacy hardened ✓ Android only

Overview

Mull is a privacy-focused web browser for Android devices that takes Firefox and removes all the data collection

. It's designed for users who want Firefox's features but without any telemetry or tracking. Mull blocks trackers and ads by default, protecting your privacy while you browse. The browser includes anti-fingerprinting patches that make it harder for websites to identify your device. Mull supports Firefox extensions, so you can add even more privacy tools like uBlock Origin. The browser is completely open source and free from proprietary components, giving you full control over your browsing data. Mull is maintained by the DivestOS team, a group focused on privacy and security. The browser is available through F-Droid, an app store for free and open source software. Note: Mull was discontinued in December 2024, but the browser remains functional and privacy-focused. Users seeking a similar experience may want to consider IronFox, which emerged as Mull's successor.

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 does not collect any data. All and mechanisms present in standard Firefox have been completely removed. The browser does not send crash reports, usage statistics, or any diagnostic data to Mozilla or any third parties. Mull ensures zero data transmission, providing complete privacy. The browser's network activity consists solely of your actual browsing traffic.
Jurisdiction & compliance Click to expand
DivestOS team is an independent project with no specific jurisdiction. No data is stored on servers. All browsing data is stored locally on your Android device. You have complete control over your data.
Mull retains no data on servers. All browsing data is stored locally on your Android device. The browser does not transmit any data to external servers. Local data (history, , cache) persists until you manually delete it. Mull's privacy-focused design ensures zero server-side . Since all is removed, there is no or retention beyond local browser storage, which you fully control.
Legal frameworks
Independent project with no specific jurisdiction. Privacy-focused design minimizes legal exposure. No data collection means minimal legal obligations.
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 from F-Droid. You do not need to provide any personal information or create an account.
Onboarding difficulty (1-5)
1
Accessibility features
Mull inherits Firefox's accessibility features for Android including screen reader support, keyboard navigation, and zoom functionality. Accessibility features depend on the Android version and Firefox base version.
Backup & portability Click to expand
Yes
Migration tools
Mull supports Firefox extension compatibility, allowing you to use privacy extensions. You can manually import bookmarks if needed. There is no built-in sync functionality to maintain privacy.
No account recovery needed - no accounts are required. Local data recovery depends on your device backup practices. If you lose your device, local browser data cannot be recovered unless you have a backup.

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