Fast QR Code Generator is a handy addon that generates QR code from any text (URL, message, number, etc.). Simply open toolbar popup to view the QR code.
a. One click QR code generation right from your browser toolbar.
b. Generated code can be sent to any device with a camera and QR reader.
c. Stores all visited tab URLs.
d. Available for all browsers (Chrome, Firefox, and Opera)
Some useful notes:
1. To use this extension you need a QR code reader installed on your cellphone.
2. There are a ton of QR code scanners for cellphones such as QR Droid™ for Android and QR Reader for iPhone for iOS.