Make Flash embedding optional.

src/General/Config.coffee

@@ -117,6 +117,10 @@ Config =
         true
         '<%= meta.name %> is NOT designed to work with the native extension.'
       ]
+      'Enable Native Flash Embedding': [
+        true
+        'Activate the native extension\'s Flash embedding if the native extension is disabled.'
+      ]
 
     'Linkification':
       'Linkify': [

src/Miscellaneous/Flash.coffee

@@ -1,6 +1,6 @@
 Flash =
   init: ->
-    if g.BOARD.ID is 'f'
+    if g.BOARD.ID is 'f' and Conf['Enable Native Flash Embedding']
       $.ready Flash.initReady
 
   initReady: ->