diff --git a/res/app/components/stf/device-context-menu/device-context-menu-directive.js b/res/app/components/stf/device-context-menu/device-context-menu-directive.js
index c0919e90..e5a3037e 100644
--- a/res/app/components/stf/device-context-menu/device-context-menu-directive.js
+++ b/res/app/components/stf/device-context-menu/device-context-menu-directive.js
@@ -17,7 +17,7 @@ module.exports = function deviceContextMenuDirective($window) {
 
       function saveToDisk(fileURL, fileName) {
         // for non-IE
-        if (!window.ActiveXObject) {
+        if (!$window.ActiveXObject) {
           var save = document.createElement('a')
           save.href = fileURL
           save.target = '_blank'
@@ -26,16 +26,16 @@ module.exports = function deviceContextMenuDirective($window) {
           var event = document.createEvent('Event')
           event.initEvent('click', true, true)
           save.dispatchEvent(event)
-          if (window.URL) {
-            window.URL.revokeObjectURL(save.href)
-          } else if (window.webkitURL) {
-            window.webkitURL.revokeObjectURL(save.href)
+          if ($window.URL) {
+            $window.URL.revokeObjectURL(save.href)
+          } else if ($window.webkitURL) {
+            $window.webkitURL.revokeObjectURL(save.href)
           }
         }
 
         // for IE
-        else if (!!window.ActiveXObject && document.execCommand) {
-          var _window = window.open(fileURL, '_blank')
+        else if (!!$window.ActiveXObject && document.execCommand) {
+          var _window = $window.open(fileURL, '_blank')
           _window.document.close()
           _window.document.execCommand('SaveAs', true, fileName || fileURL)
           _window.close()