message: Firefox push fixed in 63
diff: @@ -118,7 +118,7 @@ const browserPredicates: {
  es2017: since(52),
  es2018: since(58), // Except RegEx additions
  // Firefox bug - https://bugzilla.mozilla.org/show_bug.cgi?id=1409570
  - push: () => false,
  + push: since(63),
  serviceworker: since(44),
  modules: () => false,
  },
  