diff --git a/package.json b/package.json
index 664602a..cd9f2c0 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,8 @@
     "globals": {
       "GM": true,
       "unsafeWindow": true,
-      "globalThis": true
+      "globalThis": true,
+      "messenger": true
     }
   },
   "browserslist": {
diff --git a/src/background.js b/src/background.js
index 779faad..86290c8 100644
--- a/src/background.js
+++ b/src/background.js
@@ -1,4 +1,3 @@
-/* global messenger */
 import browser from "webextension-polyfill";
 import {
   MSG_FETCH,