Bug 1812098 - Enable the builtinGlobals option for ESLint no-shadow rule on .mjs files. r=Gijs

.sys.mjs will be handled in a future dependency of bug 1575506.

Differential Revision: https://phabricator.services.mozilla.com/D169464

.eslintrc.js

@@ -84,6 +84,12 @@ module.exports = {
         browser: false,
       },
     },
+    {
+      files: ["browser/components/storybook/**"],
+      env: {
+        "mozilla/privileged": false,
+      },
+    },
     {
       files: ["*.mjs"],
       rules: {

tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js

@@ -72,7 +72,7 @@ module.exports = {
       rules: {
         "mozilla/reject-import-system-module-from-non-system": "error",
         "mozilla/reject-lazy-imports-into-globals": "error",
-        "no-shadow": "error",
+        "no-shadow": ["error", { allow: ["event"], builtinGlobals: true }],
       },
     },
     {