Click the below link to open the Extensions page.
URL : https://chrome.google.com/webstore/detail/st-weighing-scale-extn/allpfghhmgecnjgoajkboghjbeomokcj?hl=en-GB
Click Add to Chrome.
Some time the extension will let you know if they need certain permissions or data. To approve, click Add extension.
You'll see a new download pop up at the bottom of the page for a moment, and then a pop-up window announcing that the extension has been successfully installed.