Add TAG security/privacy questionnaire

security-privacy-questionnaire.md

@@ -0,0 +1,76 @@
+https://www.w3.org/TR/security-privacy-questionnaire/
+
+### 2.1 What information might this feature expose to Web sites or other parties, and for what purposes is that exposure necessary?
+
+None
+
+### 2.2. Do features in your specification expose the minimum amount of information necessary to enable their intended uses?
+
+Yes
+
+### 2.3. How do the features in your specification deal with personal information, personally-identifiable information (PII), or information derived from them?
+
+This feature does not deal with any PII
+
+### 2.4. How do the features in your specification deal with sensitive information?
+
+N/A
+
+### 2.5. Do the features in your specification introduce new state for an origin that persists across browsing sessions?
+
+No
+
+### 2.6. Do the features in your specification expose information about the underlying platform to origins?
+
+No
+
+### 2.7. Does this specification allow an origin to send data to the underlying platform?
+
+No
+
+### 2.8. Do features in this specification enable access to device sensors?
+
+No
+
+### 2.9. Do features in this specification enable new script execution/loading mechanisms?
+
+No
+
+### 2.10. Do features in this specification allow an origin to access other devices?
+
+No
+
+### 2.11. Do features in this specification allow an origin some measure of control over a user agent’s native UI?
+
+This feature allows the origin to open an always-on-top window. The origin can
+specify an initial width/height/aspect ratio of the window but cannot set a
+position.
+
+### 2.12. What temporary identifiers do the features in this specification create or expose to the web?
+
+None
+
+### 2.13. How does this specification distinguish between behavior in first-party and third-party contexts?
+
+No difference
+
+### 2.14. How do the features in this specification work in the context of a browser’s Private Browsing or Incognito mode?
+
+No difference
+
+### 2.15. Does this specification have both "Security Considerations" and "Privacy Considerations" sections?
+
+Yes
+
+### 2.16. Do features in your specification enable origins to downgrade default security protections?
+
+No
+
+### 2.17. How does your feature handle non-"fully active" documents?
+
+The Document Picture-in-Picture window closes when navigating away, so the
+window won't exist for a non-"fully active" document
+
+### 2.18. What should this questionnaire have asked?
+
+N/A