--- a/mobile/android/base/BrowserApp.java
+++ b/mobile/android/base/BrowserApp.java
@@ -2755,17 +2755,17 @@ public class BrowserApp extends GeckoApp
             }
         }
 
         // Disable share menuitem for about:, chrome:, file:, and resource: URIs
         final boolean shareEnabled = RestrictedProfiles.isAllowed(RestrictedProfiles.Restriction.DISALLOW_SHARE);
         share.setVisible(shareEnabled);
         share.setEnabled(StringUtils.isShareableUrl(url) && shareEnabled);
         MenuUtils.safeSetEnabled(aMenu, R.id.apps, RestrictedProfiles.isAllowed(RestrictedProfiles.Restriction.DISALLOW_INSTALL_APPS));
-        MenuUtils.safeSetEnabled(aMenu, R.id.addons, RestrictedProfiles.isAllowed(RestrictedProfiles.Restriction.DISALLOW_INSTALL_EXTENSIONS));
+        MenuUtils.safeSetEnabled(aMenu, R.id.addons, RestrictedProfiles.isAllowed(RestrictedProfiles.Restriction.DISALLOW_INSTALL_EXTENSION));
         MenuUtils.safeSetEnabled(aMenu, R.id.downloads, RestrictedProfiles.isAllowed(RestrictedProfiles.Restriction.DISALLOW_DOWNLOADS));
 
         // NOTE: Use MenuUtils.safeSetEnabled because some actions might
         // be on the BrowserToolbar context menu.
         if (Versions.feature11Plus) {
             MenuUtils.safeSetEnabled(aMenu, R.id.page, !isAboutHome(tab));
         }
         MenuUtils.safeSetEnabled(aMenu, R.id.subscribe, tab.hasFeeds());

--- a/mobile/android/base/RestrictedProfiles.java
+++ b/mobile/android/base/RestrictedProfiles.java
@@ -50,17 +50,17 @@ public class RestrictedProfiles {
     }};
 
     /* This is a list of things we can restrict you from doing. Some of these are reflected in Android UserManager constants.
      * Others are specific to us.
      * These constants should be in sync with the ones from toolkit/components/parentalcontrols/nsIParentalControlServices.idl
      */
     public static enum Restriction {
         DISALLOW_DOWNLOADS(1, "no_download_files"),
-        DISALLOW_INSTALL_EXTENSIONS(2, "no_install_extensions"),
+        DISALLOW_INSTALL_EXTENSION(2, "no_install_extensions"),
         DISALLOW_INSTALL_APPS(3, "no_install_apps"), // UserManager.DISALLOW_INSTALL_APPS
         DISALLOW_BROWSE_FILES(4, "no_browse_files"),
         DISALLOW_SHARE(5, "no_share"),
         DISALLOW_BOOKMARK(6, "no_bookmark"),
         DISALLOW_ADD_CONTACTS(7, "no_add_contacts"),
         DISALLOW_SET_IMAGE(8, "no_set_image"),
         DISALLOW_MODIFY_ACCOUNTS(9, "no_modify_accounts"), // UserManager.DISALLOW_MODIFY_ACCOUNTS
         DISALLOW_REMOTE_DEBUGGING(10, "no_remote_debugging"),

--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -460,17 +460,17 @@ var BrowserApp = {
     // Broadcast a UIReady message so add-ons know we are finished with startup
     let event = document.createEvent("Events");
     event.initEvent("UIReady", true, false);
     window.dispatchEvent(event);
 
     if (this._startupStatus)
       this.onAppUpdated();
 
-    if (!ParentalControls.isAllowed(ParentalControls.INSTALL_EXTENSIONS)) {
+    if (!ParentalControls.isAllowed(ParentalControls.INSTALL_EXTENSION)) {
       // Disable extension installs
       Services.prefs.setIntPref("extensions.enabledScopes", 1);
       Services.prefs.setIntPref("extensions.autoDisableScopes", 1);
       Services.prefs.setBoolPref("xpinstall.enabled", false);
     }
 
     // notify java that gecko has loaded
     Messaging.sendRequest({ type: "Gecko:Ready" });