Mull
TAS Score: S3/3 — D5/5 — A3 / T2
Brief Description
Firefox fork with telemetry removed and privacy hardened. Applies arkenfox user.js settings by default. Available on F-Droid. Android only. The most private Firefox-based mobile browser.
Architectural Role
Client-side application layer — web browsing. Hardened Firefox without Mozilla telemetry.
Technical Autonomy
- Works without internet (browser needs internet)
- Stores data locally
- Does not require external accounts
- Allows data export (bookmarks, passwords)
- Provides offline updates (F-Droid)
Philosophical Assessment (whose.world criteria)
| Criterion | Status | Comments |
|---|---|---|
| Pause | ✅ | Stop anytime. Local data. |
| Exit | ✅ | Standard Firefox profile. |
| Recoverability | ✅ | Reinstall from F-Droid. |
| Visibility | ✅ | Open-source. Patches public. |
| External Dependencies | ✅ | No telemetry, no default Google endpoints. |
Rating key: ✅ fully meets · ⚠️ partially meets or requires configuration · ❌ does not meet
Configuration (Minimal)
Install from F-Droid (DivestOS repo). Works out of the box with hardened defaults.
Related Recipes
Alternatives
| Alternative | Autonomy | Notes |
|---|---|---|
| Firefox | A3 / T2 | Mainstream. More extensions. Some telemetry by default. |
| Brave | A3 / T1 | Chromium-based. Built-in ad blocking. |
Trajectory
Direction: stable Maintained by DivestOS project. Follows Firefox ESR releases. Small team but consistent updates. Signal assessment: | Signal | Status | Evidence | |——–|——–|———-| | License | ✅ | MPL-2.0 (inherits from Firefox). | | Feature gating | ✅ | All features free. | | Self-hosting | ✅ | Client app. | | Governance | ⚠️ | Small team (DivestOS). Bus factor risk. | Signal key: ✅ opening · ➖ neutral · ⚠️ closing —
Sources
- Website: https://divestos.org/pages/our_apps#mull
- Repository: https://codeberg.org/nicucalcea/nicuca
- Docker image: —