With dual screen, you can browsing two pages in the same screen. Just copy/paste these Javascript onto your URL on the browser which support Javascript.
javascript:finderonly=location.href;int3rnet=prompt('Masukkan%20URL%201',finderonly);brows3r=prompt('Masukkan%20URL%202',int3rnet);if(int3rnet&&brows3r){F1nd='
The first message will appear: "Enter the URL of one", the contents of the URL you want.
Fill it with (Example): http://www.vektanova.com", the second message: Enter the URL 2", the contents of the URL you want. Fill it with (Example) http://www.google.com