User can open same application in more than two tabs in same browser
<p>I am working on an N2 project, and one bug arose.</p>

<p>In N2 software the user can open the same application more than two times in the same browser.  How can I solve this problem?</p>

<p>I want the user to only be able to open the N2 application once in the same browser.  If the user logs in with the same or different user id in the N2 software with the same browser then display a message box.</p>

<p>I am a junior developer, so please provide full details.</p>
