The panel needs the extension enabled and permission for the correct website. For Kindle, your chosen store must match the one where your library is.

Step by step

  1. In Safari, open the page menu to the left of the address and select the import extension. Choose Always Allow on This Website when that option appears.
  2. If you hid the panel, choose Show panel on this website in the same menu.
  3. Use a normal tab. Private tabs require Allow in Private Browsing in the extension's Settings.
  4. If the export stopped, return to your library page and try exporting again, keeping the screen open.
  5. After the extension confirms it sent your books, return to the app and check Imports from Safari.