I think you misunderstood the article that image is in. It's about creating QR-codes, mostly so you can quickly open the same page on your phone by taking a picture of the screen using the phone. Quick Response codes are really meant for mobile devices. If you absolutely have to use a QR-code on your PC, something like
Code:
xdg-open $(zbarcam --raw)
will read in a QR-code from the camera and open the URL from it in your default browser. For using QR codes directly in your browser there are extensions you can install, for example this one.
Holger
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