--- a/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js
@@ -52,16 +52,19 @@ module.exports = {
     "sizeToContent": false,
     // Specific to Firefox
     // eslint-disable-next-line max-len
     // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/uneval
     "uneval": false
   },
 
   "parserOptions": {
+    "ecmaFeatures": {
+      "experimentalObjectRestSpread": true
+    },
     "ecmaVersion": 8
   },
 
   // When adding items to this file please check for effects on sub-directories.
   "plugins": [
     "mozilla",
     "no-unsanitized"
   ],