destinationFolder is not nullable

Author: sadym-chromium

index.bs

@@ -2835,6 +2835,7 @@ The [=remote end steps=] are:
 
 </div>
 
+
 #### The browser.getUserContexts Command #### {#command-browser-getUserContexts}
 
 The <dfn export for=commands>browser.getUserContexts</dfn> command returns a
@@ -3057,7 +3058,7 @@ list of [=client window=]s.
 
       browser.DownloadBehaviorAllowed = (
         type: "allowed",
-        ? destinationFolder: text / null
+        ? destinationFolder: text
       )
 
       browser.DownloadBehaviorDenied = (