Privacy Policy

Last updated: June 13, 2026

Cortex Capture is a browser extension that clips the page you are viewing into your own Cortex knowledge graph. This policy explains what the extension reads, what it stores, and where that data goes.

What the extension reads

• Page content, only on your click. When you open the Cortex popup and press "Send to Cortex", the extension reads the current tab through Chrome's activeTab permission, which grants access to that one tab only at the moment you invoke the extension. The extension does not read pages in the background, does not run on every site, and has no standing access to your browsing.
• Your selection wins. If you have text selected when you send, only that selection is captured.
• Raw page HTML fallback. On a regular web page, if you have nothing selected and the extension cannot extract readable content locally, it sends the page's raw HTML (up to 3 MB) to your Cortex backend, which extracts the main content. Only on your click, only for that page.
• Logged-in services (Gmail, ChatGPT, Claude, X, and Gemini). These pages only render the part of a conversation you can see, so a plain text read misses most of a long thread. When you clip one of these pages, the extension reads the full conversation. On Gmail it reads the open thread from the page. On ChatGPT, Claude, and X it uses your existing logged-in session on that site to request the full conversation from that site's own API (on X, only the original author's own thread, not other people's replies). On Gemini it reads the open conversation from the rendered page, with no extra request. This happens only for the page you clip, only on your click. The extension never stores or transmits your login for these sites.

What the extension stores

• Your Cortex account token. When you connect the extension to your Cortex account, a token is saved in Chrome's local storage on your device so you stay connected. It is used only as the credential to reach your Cortex account. Disconnecting in the extension, or uninstalling it, removes it.
• The Cortex address. The extension talks to the hosted Cortex service at a default address that ships built in; this is not information collected from you. If you run your own Cortex server, you can point the extension at it, and that address is saved locally.

Where your data goes

• To your Cortex backend, and nowhere else. Captured content is sent to your Cortex backend, authenticated with your token, and lands in your own Cortex account. By default that is the hosted Cortex service operated by the Cortex developer, whose infrastructure stores your captures only to provide your account. If you point the extension at a self-hosted server, your data goes only there.
• No third parties. The extension uses no analytics, advertising, tracking, or telemetry, and sends data to no service other than the Cortex backend you choose.

What is not collected

The extension does not collect or transmit your browsing history, your credentials for other sites, your location, or any data from pages you did not choose to clip.

Contact

Questions about this policy can be sent to the developer through askcortex.app.

askcortex.app