When used on a supported Steam page, the OpenGameStats browser extension handles the public Steam app ID, the user’s selected price country, visible public price information, public achievement-page content, and limited extension preferences. The app ID and selected country are sent over HTTPS to OpenGameStats to return stored game statistics. Other supported page information is processed locally.

The extension does not collect Steam credentials, Steam identity, game-library data, purchases, personal achievement unlock state, OpenGameStats API keys, personal communications, or payment information. Extension data is used only to provide and improve the extension’s user-facing features. It is not sold, used for advertising, or used for creditworthiness or lending decisions.

https://opengamestats.com/privacy