No Duplicate Tabs – Privacy Policy
No Duplicate Tabs is a Chrome extension that prevents duplicate tabs from being opened and lets you jump back to the original tab instead.
Data the extension uses
The extension reads the URLs of your open tabs using Chrome’s tabs API. This is only used to detect when you open a duplicate of an already open page.
The extension uses Chrome’s storage API to store a small list of normalized URLs for which you have chosen to “allow duplicates”.