About

What Cefrium is

Cefrium is a port of the Chromium Embedded Framework (CEF) to native Android (aarch64-linux-android). It lets an Android app embed the full Chromium engine — the same engine on every device — instead of the system WebView, with off-screen rendering, the CEF C API, and multi-process operation through Android services. It is distributed as a Gradle-integrated SDK.

Status

Cefrium Browser is published as a public beta. The Cefrium SDK is pre-1.0: the public API still changes between minor releases, and it has not yet been through a large production deployment. If you are evaluating it for a product that is welcome — plan for API changes before 1.0, and talk to us about what you need.

Rather than asking you to take a label on trust, here is what you can check yourself: the engine tracks upstream Chromium releases, so it inherits their security fixes; releases are cut in response to issues reported by real users, and the cadence is visible on the releases page; every release ships a GPG-signed SHA256SUMS; and known limitations are written down in the SDK's feature notes rather than left out.

Cefrium is open source, and developers interested in co-maintaining are welcome — cefrium@proton.me.

Maintainer

Cefrium is developed and maintained by Juan Manuel Méndez Rey, Debian package maintainer, currently working with the Debian Chromium team on Chromium Embedded Framework packaging.

Maintainer OpenPGP key

The maintainer's OpenPGP fingerprint (a fingerprint is public; only the private key is secret) for verifying or signing the key:

2A84 0ED0 0DE6 69F4 219B  8B33 02A7 9E3B 8215 1695

Fetch it from keys.openpgp.org (gpg --keyserver hkps://keys.openpgp.org --recv-keys 2A840ED00DE669F4219B8B3302A79E3B82151695). At a key-signing event you can also exchange it with the Cefrium keysigning companion.

Development practices

Cefrium's architecture, design constraints, product direction, hardware testing, and maintenance are human-directed; implementation is significantly AI/LLM-assisted and validated against device behavior.

License

Cefrium is licensed under LGPL-3.0-or-later (the underlying CEF and Chromium are BSD-licensed). Commercial licensing is available for projects that need different terms — inquiries to cefrium@proton.me.

Forks and derivatives are welcome. How the license, the Cefrium trademark, the official build channels, and the codec policy relate is set out in Trademark & Forks.

Affiliation

Cefrium is not affiliated with or endorsed by Google or the Chromium project. CEF is maintained by Marshall Greenblatt.

Contact

Email cefrium@proton.me, or open an issue on Codeberg.