3. The method of claim 1 , further comprising: determining a type of the browser; based on the determined type of the browser, determining a type of device on which the browser is running; based on the device type, determining a display size of a display device on the device; and during the private conversation, dynamically adjusting an arrangement of subpages displayed in the browser based on the display size and an orientation of the device.
3. The method of claim 1 , further comprising: determining a type of the browser; based on the determined type of the browser, determining a type of device on which the browser is running; based on the device type, determining a display size of a display device on the device; and during the private conversation, dynamically adjusting an arrangement of subpages displayed in the browser based on the display size and an orientation of the device. 4. The method of claim 3 , wherein the orientation is portrait or landscape, and wherein the device is a desktop computer, a laptop computer, a portable cellular device having a wireless transceiver operable in one or more cellular frequency bands, or a tablet computer.