Chrome extension Like buffer . com web site : How can I achieve this functionality in my web application ?


[go to this location for better understanding][1]


[and here is the image showing the extension adding pop up.][2]


  [1]: https://i.stack.imgur.com/c5QjZ.png
  [2]: https://i.stack.imgur.com/hND9y.png

Everywhere in stackoverflow and google it is telling that we cannot add extension pop up like :

https://stackoverflow.com/questions/17928979/how-to-programmatically-open-chrome-extension-popup-html

Please help me to know how can we display this alert "add extension" .
