Bug 1506044 - Do not send cookies with ASan reporter submits. r=johannh

Differential Revision: https://phabricator.services.mozilla.com/D12317

--HG--
extra : moz-landing-system : lando

browser/modules/AsanReporter.jsm

@@ -163,6 +163,9 @@ function submitToServer(data) {
       // For internal testing purposes, an auth_token can be specified
       if (auth_token) {
         xhr.setRequestHeader("Authorization", "Token " + auth_token);
+      } else {
+        // Prevent privacy leaks
+        xhr.channel.loadFlags |= Ci.nsIRequest.LOAD_ANONYMOUS;
       }
 
       xhr.onreadystatechange = function() {