Useful does not collect, store, transmit, sell, or share personal data or browsing data.

The extension accesses webpage content locally in the browser on sites enabled by the user so that it can identify, hide, and extract comments.

When the user clicks "Copy for ChatGPT," the extracted comment text and summarization instructions are copied to the user's clipboard. Useful does not send this content to ChatGPT, OpenAI, or any other external service. Any subsequent use of the clipboard contents is performed by the user.

The extension stores its enabled-site settings locally in Firefox. Useful does not use analytics, advertising, tracking, telemetry, or remote servers.