fix new tab issue in Tampermonkey

src/Posting/QR.coffee

@@ -858,9 +858,9 @@ QR =
     QR.cooldown.set {req, post, isReply, threadID}
 
     URL = if threadID is postID # new thread
-      "/#{g.BOARD}/thread/#{threadID}"
+      "#{window.location.origin}/#{g.BOARD}/thread/#{threadID}"
     else if g.VIEW is 'index' and !QR.cooldown.auto and Conf['Open Post in New Tab'] # replying from the index
-      "/#{g.BOARD}/thread/#{threadID}#p#{postID}"
+      "#{window.location.origin}/#{g.BOARD}/thread/#{threadID}#p#{postID}"
     if URL
       if Conf['Open Post in New Tab']
         $.open URL