diff --git a/packages/transformers/webextension/src/schema.js b/packages/transformers/webextension/src/schema.js
index e72edc25185..8bfa8710c22 100644
--- a/packages/transformers/webextension/src/schema.js
+++ b/packages/transformers/webextension/src/schema.js
@@ -406,6 +406,14 @@ const commonProps = {
     additionalProperties: false,
   },
   version_name: string,
+  oauth2: {
+    type: 'object',
+    properties: {
+      client_id: string,
+      scopes: arrStr,
+    },
+    additionalProperties: false,
+  },
 };
 
 export const MV3Schema = ({