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Inspect and act ​

Inspect and act is an Extension.js framework feature. Through the agent bridge, extension inspect reads the live, post injection DOM of any surface, and extension eval, storage, reload and open run scoped operations inside the extension's own context, on Chrome and Firefox. Acting is gated per session with --allow-control and --allow-eval. All of it is local and needs no account. The addressing model, the safety gates, and every flag live in the framework's Debugging section.

What the platform adds ​

The MCP server reaches the same machinery from an agent: extension_inspect and extension_dom_snapshot read, and extension_eval, extension_storage, extension_reload and extension_open act, under the same session gates. Nothing the agent reads or touches here leaves the developer's machine.

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