diff --git a/meta/crx/vapi-background.js b/meta/crx/vapi-background.js
index 84587d6f7..ce88e4964 100644
--- a/meta/crx/vapi-background.js
+++ b/meta/crx/vapi-background.js
@@ -75,7 +75,7 @@ vAPI.tabs.get = function(tabId, callback) {
             return;
         }
         callback(tab);
-    }
+    };
     if ( tabId !== null ) {
         chrome.tabs.get(tabId, onTabReady);
         return;
diff --git a/meta/crx/vapi-common.js b/meta/crx/vapi-common.js
index 17879b1c0..cce22b22a 100644
--- a/meta/crx/vapi-common.js
+++ b/meta/crx/vapi-common.js
@@ -21,6 +21,8 @@
 
 // For background page or non-background pages
 
+/* global self, vAPI */
+
 /******************************************************************************/
 
 (function() {
@@ -36,7 +38,7 @@ self.vAPI = self.vAPI || {};
 var setScriptDirection = function(language) {
     document.body.setAttribute(
         'dir',
-        ~['ar', 'he', 'fa', 'ps', 'ur'].indexOf(language) ? 'rtl' : 'ltr'
+        ['ar', 'he', 'fa', 'ps', 'ur'].indexOf(language) !== -1 ? 'rtl' : 'ltr'
     );
 };
 
diff --git a/src/js/mirrors.js b/src/js/mirrors.js
index 9efd17f38..46bc6f617 100644
--- a/src/js/mirrors.js
+++ b/src/js/mirrors.js
@@ -20,9 +20,7 @@
 */
 
 /* jshint bitwise: false */
-/* global µBlock, YaMD5 */
-
-'use strict';
+/* global vAPI, µBlock, YaMD5 */
 
 /******************************************************************************/
 
@@ -30,6 +28,8 @@
 
 µBlock.mirrors = (function() {
 
+'use strict';
+
 /******************************************************************************/
 
 // To show keys in local storage from console:
diff --git a/src/js/popup.js b/src/js/popup.js
index bc733df23..4a9b904c5 100644
--- a/src/js/popup.js
+++ b/src/js/popup.js
@@ -20,12 +20,13 @@
 */
 
 /* global vAPI, uDom */
-'use strict';
 
 /******************************************************************************/
 
 (function() {
 
+'use strict';
+
 /******************************************************************************/
 
 var stats;
diff --git a/tools/import-crowdin.sh b/tools/import-crowdin.sh
old mode 100644
new mode 100755