[epos]

Web Extension Engine.

Epos is an extension for building Chromium extensions with React. Connect your local folder to Epos and start developing. When ready, just click "Export" to get a standalone ZIP file that you can publish. ⚡ What Epos gives you: • A cross-context messaging system. • Shared state with persistence and sync. • Storage for files and other data. • Extension APIs available in any context. • Automatic script injection + Shadow DOM. • A simpler setup through epos.json. ⚠️ Core Constraints: • React: Epos is built around React. • Chromium: Firefox and Safari are not supported. • Manifest V3: No support for the legacy Manifest V2. • No HMR: Live reload is available, but hot module replacement is not. • No Source Maps: Epos injects its runtime into your code, so source maps do not work. • Permissions: Certain manifest permissions are required and cannot be omitted. To try it out, install Epos and follow the guide at https://epos.dev/guide/basics