(https://github.com/iwpurz/docs-afterglow/blob/main/PRIVACY.md)
Docs Afterglow does not collect, transmit or share any data.

• It runs only on docs.google.com/document/* and changes how the page looks. It does not read, store or
  send the content of your documents.
• Your settings, saved themes and any images/videos you add are stored locally with Firefox's extension
  storage and never leave your device. Removing the extension deletes them.
• It makes no network requests of its own. If you enter an image URL as a background, Firefox fetches that
  image the way it would any web image.
• No analytics, telemetry, ads or third-party code.
• Exported theme/settings files contain only what you see in the app. Theme files you import are
  sanitized: only embedded images and videos are kept, and remote links are ignored.