Because Chrome store can not be used to install plug-in a lot of trouble.
Elasticsearch-Head can download the plug-in on GitHub: https://github.com/mobz/elasticsearch-head/blob/master/crx/es-head.crx
Downloaded to the local.
If you drag and drop directly into Chrome will not use, tell your non-Chrome sources.
This time the file extension ".crx" changed to ".rar", and then extract it to the folder, and then through Chrome "Load unpacked extension" button to add folders ready for use.
