Make test for using Pale Moon workaround stricter.

src/General/lib/$.coffee

@@ -226,8 +226,9 @@ $.event = (event, detail, root=d) ->
 
 <% if (type === 'userscript') { %>
 # XXX Make $.event work in Pale Moon with GM 3.x (no cloneInto function).
-unless typeof cloneInto is 'function' or /^[01]\./.test(GM_info.version) or GM_info.scriptHandler # not FF30+, GM1-, or Tampermonkey
-  do ->
+do ->
+  return unless /PaleMoon\//.test(navigator.userAgent) and +GM_info?.version?.split('.')[0] >= 2 and typeof cloneInto is 'undefined'
+
   try
     new CustomEvent 'x', detail: {}
   catch err