Opt out of Google's FLoC Network by default

docs/example.nginx.conf

@@ -60,6 +60,9 @@ server {
     add_header Access-Control-Allow-Origin "*";
     # add_header X-Frame-Options "SAMEORIGIN";
 
+    # Opt out of Google's FLoC Network
+    add_header Permissions-Policy interest-cohort=();
+
     set $coop '';
     if ($uri ~ ^\/(sheet|presentation|doc)\/.*$) { set $coop 'same-origin'; }