Firefox console reports some unreachable code after return statement in root_front.js

Around line 2221 when unminified, line 141 in minified version:

_updateAttachmentImage: function (attachment, response) {
      return;
      if (!(attachment.is('img'))) {
        return;
      }

 

It's part of a minor new feature we were introducing in 4.7.7. It wasn't working very well so we disabled it and will revisit it in a later release.