Effective: June 15, 2026
Cookie Jar is built with privacy as a core principle. The extension operates entirely within your browser and does not transmit any personal data to external servers. This policy explains what data the extension accesses, how it is used, and how it is stored.
The extension accesses cookie metadata (name, domain, expiry, and flags such as HttpOnly and Secure) from your browser in order to classify and selectively block cookies. Cookie values are never read, stored, or transmitted. The extension does not access your browsing history, form data, passwords, or any other personal information.
All data generated by the extension — including your cookie category preferences, custom rules, per-domain overrides, and the blocked-cookie log used for Statistics — is stored exclusively in your browser using chrome.storage.local and chrome.storage.sync. This data never leaves your device and is not accessible to Snickerdoodles or any third party.
Cookies are classified locally using pattern-matching rules and heuristics bundled within the extension. No cookie names, domains, or metadata are sent to any external server for classification or analysis. Classification happens entirely on your device.
The extension does not integrate any third-party analytics services, advertising networks, or crash-reporting tools. We do not use your data for advertising purposes and we do not sell, rent, or share your data with any third party.
The extension requests only the browser permissions necessary to function: access to cookies (to read and block them), access to the active tab's URL (to apply per-domain rules), storage (to save your preferences locally), scripting (to detect cookie-consent dialogs and choose "reject" on your behalf, and to inject fallback hiding styles), and webNavigation (to act at the earliest point in page load). No broader permissions are requested or used.
When enabled, the extension automatically responds to cookie-consent dialogs on the websites you visit by selecting "reject" or "decline" on your behalf, so you are opted out of non-essential cookies without clicking through each banner. This is done entirely within your browser using a bundled, open-source rule set (DuckDuckGo's autoconsent, MPL-2.0); when auto-reject is turned off, it falls back to simply hiding the banners with a stylesheet. No information about which banners or websites you encountered is collected, stored, or transmitted, and no remote code is ever downloaded or executed.
The extension is not directed at children under the age of 13. We do not knowingly collect any information from children.
We may update this Privacy Policy from time to time to reflect changes in the extension's functionality or applicable law. The effective date at the top of this page will reflect the most recent revision.
If you have questions or concerns about this Privacy Policy or the extension's data practices, please contact us at j1ty@ucsd.edu.