This application allows you to simultaneously view two pages on one tab. Displaying pages occur via iframe. Sites with option installed X-Frame-Options DENY will be displayed. UPD 02092013 1. Possibility to enter the URL of the page comparison 2. Ability to change the panels at the touch of a button 3. The added reference UPD 27082013 1. Added ability to view the page source code. UPD 26082013 1. Added the ability to display only the left pane, or just the right pane.