--- a/toolkit/modules/ActorManagerParent.jsm
+++ b/toolkit/modules/ActorManagerParent.jsm
@@ -182,17 +182,16 @@ let ACTORS = {
         "Finder:Initialize",
       ],
     },
   },
 
   ManifestMessages: {
     child: {
       module: "resource://gre/modules/ManifestMessagesChild.jsm",
-      group: "browsers",
       messages: [
         "DOM:Manifest:FireAppInstalledEvent",
         "DOM:ManifestObtainer:Obtain",
         "DOM:WebManifest:fetchIcon",
         "DOM:WebManifest:hasManifestLink",
       ],
     },
   },