diff --git a/packages-exp/messaging-compat/package.json b/packages-exp/messaging-compat/package.json
index f2f511d198d..7853ff96d9f 100644
--- a/packages-exp/messaging-compat/package.json
+++ b/packages-exp/messaging-compat/package.json
@@ -6,6 +6,7 @@
   "private": true,
   "author": "Firebase <firebase-support@google.com> (https://firebase.google.com/)",
   "main": "dist/index.cjs.js",
+  "browser": "dist/index.esm.js",
   "module": "dist/index.esm.js",
   "esm2017": "dist/index.esm2017.js",
   "typings": "dist/src/index.d.ts",
diff --git a/packages-exp/messaging-exp/package.json b/packages-exp/messaging-exp/package.json
index 3f7f2bd6fc6..0a395bd0731 100644
--- a/packages-exp/messaging-exp/package.json
+++ b/packages-exp/messaging-exp/package.json
@@ -5,6 +5,7 @@
   "description": "",
   "author": "Firebase <firebase-support@google.com> (https://firebase.google.com/)",
   "main": "dist/index.cjs.js",
+  "browser": "dist/index.esm.js",
   "module": "dist/index.esm.js",
   "esm2017": "dist/index.esm2017.js",
   "typings": "dist/index.d.ts",