Welcome to the UiPath community !!!.
As @lakshman suggested please follow the steps but if it still does not work then i would suggest you to follow the steps mentioned below:
I have faced the issues even after following the steps and i figured out the problem.
UiPath chrome extension is not compatible with latest version of chrome and in that case you need to download some older version of chrome which will allow you to install the chrome extension and you will be able to see the installed extension in the chrome.
Use the url below to download the compatible version of chrome.