diff --git a/spec.bs b/spec.bs
index d36b09091..f97ada0cb 100644
--- a/spec.bs
+++ b/spec.bs
@@ -4322,8 +4322,16 @@ interface ProtectedAudience {
 <div algorithm>
 
 The <dfn for=ProtectedAudience method>queryFeatureSupport(feature)</dfn> method steps are:
-1. If feature is "adComponentsLimit", return 40.
-2. Return `undefined`.
+1. Let |featuresTable| be an [=ordered map=] whose keys are {{DOMString}}s and whose values are
+   {{boolean}}s or {{long}}s, with the following entries:
+    :   "adComponentsLimit"
+    ::  40
+    :   "deprecatedRenderURLReplacements"
+    :: true
+    :   "reportingTimeout"
+    :: true
+1. If |featuresTable|[|feature|] [=map/exists=], then return |featuresTable|[|feature|].
+1. Return `undefined`.
 
 </div>