A private browsing function of a web browser application program may be triggered for a browser by a browser or by a URL provider. To minimize the friction between the cutting edges, a support device having visco-elastic properties is provided between the two bearings. A pair of reflection planes of the deflector is provided so as to have a tilt angle to an optical axis of the laser beam, whereby the entrance of the optical waveguide or the light pipe is expanded. Optionally, the matrix reading device may decode the matrix code and transmit associated data to the monitoring entity.