--- a/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js
+++ b/tools/lint/eslint/eslint-plugin-mozilla/lib/configs/recommended.js
@@ -36,16 +36,19 @@ module.exports = {
     // https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/InternalError
     "InternalError": true,
     "KeyEvent": false,
     "MatchGlob": false,
     "MatchPattern": false,
     "MatchPatternSet": false,
     "MenuBoxObject": false,
     // Specific to Firefox (Chrome code only).
+    "PlacesObservers": false,
+    "PlacesWeakCallbackWrapper": false,
+    // Specific to Firefox (Chrome code only).
     "SharedArrayBuffer": false,
     "SimpleGestureEvent": false,
     // Note: StopIteration will likely be removed as part of removing legacy
     // generators, see bug 968038.
     "StopIteration": false,
     "StructuredCloneHolder": false,
     "WebAssembly": false,
     "WebExtensionContentScript": false,