diff --git a/Gruntfile.coffee b/Gruntfile.coffee
index 1daa1bb1a..665c468b6 100755
--- a/Gruntfile.coffee
+++ b/Gruntfile.coffee
@@ -297,21 +297,18 @@ module.exports = (grunt) ->
         '-W084': true
         '-W083': true
         '-W093': true
-        globals:
-          Notification: true
-          MediaError:   true
-          Set:          true
-          GM_getValue:  true
-          GM_setValue:  true
-          GM_deleteValue: true
-          GM_listValues: true
-          GM_addValueChangeListener: true
-          GM_openInTab: true
-          GM_xmlhttpRequest: true
-          GM_info:      true
-          cloneInto:    true
-          unsafeWindow: true
-          chrome:       true
+        globals: do ->
+          globals =
+            Notification: true
+            MediaError:   true
+            Set:          true
+            GM_info:      true
+            cloneInto:    true
+            unsafeWindow: true
+            chrome:       true
+          pkg = grunt.file.readJSON 'package.json'
+          globals[v] = true for v in pkg.meta.grants
+          globals
       script: 'tmp-<%= pkg.type %>/*.js'
 
   require('load-grunt-tasks') grunt
diff --git a/package.json b/package.json
index 34e816b5b..13c3b760e 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,15 @@
       "https://www.google.com/recaptcha/api2/frame?*&k=6Ldp2bsSAAAAAAJ5uyx_lx34lJeEpTLVkP5k04qc*",
       "*://www.google.com/recaptcha/api/fallback?k=6Ldp2bsSAAAAAAJ5uyx_lx34lJeEpTLVkP5k04qc*"
     ],
+    "grants": [
+      "GM_getValue",
+      "GM_setValue",
+      "GM_deleteValue",
+      "GM_listValues",
+      "GM_addValueChangeListener",
+      "GM_openInTab",
+      "GM_xmlhttpRequest"
+    ],
     "suffix": {
       "stable": "",
       "beta": "-beta",
diff --git a/src/General/meta/metadata.js b/src/General/meta/metadata.js
index b75a582d4..f7d407810 100755
--- a/src/General/meta/metadata.js
+++ b/src/General/meta/metadata.js
@@ -18,13 +18,11 @@
     }
   }).join('\n')
 %>
-// @grant        GM_getValue
-// @grant        GM_setValue
-// @grant        GM_deleteValue
-// @grant        GM_listValues
-// @grant        GM_addValueChangeListener
-// @grant        GM_openInTab
-// @grant        GM_xmlhttpRequest
+<%=
+  meta.grants.map(function(grant) {
+    return '// @grant        ' + grant;
+  }).join('\n')
+%>
 // @run-at       document-start
 <% if (channel !== 'dev') { %>// @updateURL    <%= (channel !== 'noupdate') ? (meta.downloads + name + meta.suffix[channel] + '.meta.js') : 'https://noupdate.invalid/' %>
 // @downloadURL  <%= (channel !== 'noupdate') ? (meta.downloads + name + meta.suffix[channel] + '.user.js') : 'https://noupdate.invalid/' %>