add tabs on new tab page code example

Example 1: open link in new tab

<a href="https://www.google.com/" rel="noopener noreferrer" target="_blank">google.com</a>

dont use just target="_blank" without  rel="noopener noreferrer" 
It Makes Your Site Vulnerable to Phishing Attacks

Example 2: add tabs html

&nbsp;  <!-- 1 space -->
&ensp;	<!-- tab; 2 space -->
&emsp;	<!-- tab; 4 space -->