Elasticsearch's plugin ecosystem has historically been fragmented. That's why we make the plugin available in multiple ways (hosted app, chrome extension and site plugin).

Links:

[1] Hosted app - http://appbaseio.github.io/mirage/

[2] Chrome extension - https://chrome.google.com/webstore/detail/mirage/dcnlpfmnpog...

[3] Site Plugin for Elasticsearch v2.x - plugin install appbaseio/mirage