Hardcode the engine.

lib/$.coffee

@@ -16,7 +16,7 @@ $.extend $,
   MINUTE: 1000 * 60
   HOUR  : 1000 * 60 * 60
   DAY   : 1000 * 60 * 60 * 24
-  engine: /WebKit|Presto|Gecko/.exec(navigator.userAgent)[0].toLowerCase()
+  engine: <% if (type === 'crx') { %>webkit<% } else if (type === 'userjs') { %>presto<% } else { %>gecko<% } %>
   id: (id) ->
     d.getElementById id
   ready: (fc) ->

src/globals.coffee

@@ -8,7 +8,7 @@ Conf = {}
 c    = console
 d    = document
 doc  = d.documentElement
-g =
+g    =
   VERSION:   '<%= version %>'
   NAMESPACE: '<%= meta.name %>.'
   boards:  {}