fixup closes origin-api/issues#11

Author: mikewest

source

@@ -92525,6 +92525,12 @@ interface <dfn interface data-x="dom-Origin-interface">Origin</dfn> {
   data-x="dom-Origin-isSameSite">isSameSite(other)</code></dfn> method returns true if
   <span>this</span>'s <span data-x="dom-Origin-origin">origin</span> is <span>same site</span> with
   <var>other</var>'s <span data-x="dom-Origin-origin">origin</span>, and false otherwise.</p>
+
+  <p class="note">Note that same-site checks might return different values for the same origins in
+  different user agents, or even in the same user agent at different times, as the public suffix
+  list is updated and distributed in implementation-defined ways. <span
+  data-x="dom-Origin-isSameSite">isSameSite()</span> reflects the user agent's current understanding
+  of the relationship between two origins, but makes no promises about the future.</p>
   </div>