The extension collects no data. It has no analytics, no accounts, and makes no network requests of any kind.
It runs only on linkedin.com, where it reads the verdict badges that your separately installed GPTZero extension has already added to the page, and hides matching posts. That reading happens entirely inside your browser; nothing you see, browse, or post is transmitted anywhere.
Your preferences (the on/off switch and which labels to hide) are stored with Chrome’s built-in extension storage, which Chrome may sync between your own devices via your Google account. I never see these settings.
No data is collected, so none is shared or sold, and there is nothing to delete. If this policy ever changes, the change will be listed here and in the extension’s changelog.
If you have any questions, please contact me!