QR code is used for most modern way to share link, most of the mobile have QR code readers. In mobile device, read QR code simply focus the QR image then it will automatically go to the link. In your computer QR code reader is very less. QRreader is useful extension of Google Chrome, It will easily read QR code from your browser and go the details.
You can easily add QRreader in Google Chrome.if you want to read any QR image simply right click on the QR image you can see an option “Read QR Code from image” simply click on that it will scan the code and open URL.