Pull a Thread's full privacy policy is at https://pullathread.com/privacy/. The extension does nothing until you press one of its buttons, menu items or keys. Then it sends what you chose (a screenshot, a section you drew a box around, a picture, the words you highlighted, or the page's address and title) to your own wall at pullathread.com. It keeps your sign-in code and the thread you last picked in your browser. It does not read your browsing history, does not watch the pages you visit, and never talks to any site but pullathread.com.