WebBrain

WebBrain is an open-source browser extension for asking questions about pages, extracting information and carrying out browser tasks. It connects to supported cloud models or a local model, so users can choose the setup behind the assistant.

The sidebar supports page-aware conversations, structured data extraction and actions such as navigating and filling forms. Its default Ask mode is read-only, with confirmation steps for consequential actions. Official downloads are available for Chrome and Firefox, with documentation for configuration, model providers and MCP integration.