diff --git a/src/lib/browser-polyfill.js b/src/lib/browser-polyfill.js
index b3dd82d..8f9236a 100644
--- a/src/lib/browser-polyfill.js
+++ b/src/lib/browser-polyfill.js
@@ -1183,4 +1183,4 @@
     module.exports = browser; // eslint-disable-line no-undef
   }
 });
-//# sourceMappingURL=browser-polyfill.js.map
+// !disabled because of https://bugzilla.mozilla.org/show_bug.cgi?id=1437937 # sourceMappingURL=browser-polyfill.js.map