diff --git a/4chan_x.js b/4chan_x.js
index ecf5ed2f3..13bc84ed0 100644
--- a/4chan_x.js
+++ b/4chan_x.js
@@ -118,11 +118,6 @@
       return _config[parent] = obj;
     }
   })(null, config);
-  if (typeof GM_deleteValue === 'undefined') {
-    window.GM_openInTab = function(url) {
-      return window.open(url, "_blank");
-    };
-  }
   ui = {
     dialog: function(id, position, html) {
       var el, left, top, _ref, _ref2, _ref3;
@@ -712,7 +707,7 @@
       id = thread.firstChild.id;
       url = "http://boards.4chan.org/" + g.BOARD + "/res/" + id;
       if (tab) {
-        return GM_openInTab(url);
+        return window.open(url, "_blank");
       } else {
         return location.href = url;
       }
diff --git a/script.coffee b/script.coffee
index 2e01b7203..cbcfd2229 100644
--- a/script.coffee
+++ b/script.coffee
@@ -56,11 +56,6 @@ _config = {}
     _config[parent] = obj
 ) null, config
 
-#x-browser
-if typeof GM_deleteValue is 'undefined'
-  window.GM_openInTab = (url) ->
-    window.open url, "_blank"
-
 ui =
   dialog: (id, position, html) ->
     el = document.createElement 'div'
@@ -518,7 +513,7 @@ keybinds =
     id = thread.firstChild.id
     url = "http://boards.4chan.org/#{g.BOARD}/res/#{id}"
     if tab
-      GM_openInTab url
+      window.open url, "_blank"
     else
       location.href = url