--- a/.eslintignore
+++ b/.eslintignore
@@ -253,16 +253,17 @@ js/ductwork/**
 js/examples/**
 js/ipc/**
 js/public/**
 js/xpconnect/**
 js/src/devtools/**
 js/src/octane/**
 js/src/jit-test/**
 js/src/tests/**
+js/src/Y.js
 
 # mobile/android/ exclusions
 mobile/android/tests/browser/chrome/tp5/**
 
 # Uses `#filter substitution`
 mobile/android/b2gdroid/app/b2gdroid.js
 mobile/android/app/mobile.js
 mobile/android/chrome/content/healthreport-prefs.js