diff --git a/.changeset/real-ravens-prove.md b/.changeset/real-ravens-prove.md
new file mode 100644
index 00000000000..ea2ecca2171
--- /dev/null
+++ b/.changeset/real-ravens-prove.md
@@ -0,0 +1,5 @@
+---
+'@firebase/auth': patch
+---
+
+Emit a module package file with esm2017 auth browser extension builds
diff --git a/packages/auth/rollup.config.js b/packages/auth/rollup.config.js
index c31417ca1a4..46d3ee0380d 100644
--- a/packages/auth/rollup.config.js
+++ b/packages/auth/rollup.config.js
@@ -125,7 +125,8 @@ const browserWebExtensionBuilds = [
     },
     plugins: [
       ...es2017BuildPlugins,
-      replace(generateBuildTargetReplaceConfig('esm', 2017))
+      replace(generateBuildTargetReplaceConfig('esm', 2017)),
+      emitModulePackageFile()
     ],
     external: id => deps.some(dep => id === dep || id.startsWith(`${dep}/`))
   },