strict_min_version

Author: KentoNishi

src/manifest.json

@@ -63,7 +63,7 @@
   "browser_specific_settings": {
     "gecko": {
       "id": "{20f2dcdf-6f8d-4aeb-862b-b13174475d9c}",
-      "strict_min_version": "42.0"
+      "strict_min_version": "58.0"
     }
   }
 }