You’ve probably come across extensions that allow you to install them from their website without ever going to the Chrome extension store. This is what Chrome calls inline installation and it’s a great way to make it easier for users to install an extension.
Overview
Inline installation requires 3 parts. A link tag in the head of your website, a call to the JavaScript function chrome.webstore.install() and lastly the extension must be assigned to the domain you want to use for inline installation. Read More