Simple built-in duplicate-tab-prevention.
Install and *shazam* no more duplicate tabs! Supports three modes: keep new tab, keep old tab, and off. Easily switch between modes with one click or pick a setting, hide the button, and never think about duplicates again.
*Options panel with ability to disable/enable for specific URLs.
*Options panel with ability to keep old, keep new, or disable.
*Right-Click feature to temporarily allow duplicates (optional).
*Instant duplicate scan post-installation.
*Never closes pinned tabs.
*The URL bar is still selected when creating new tabs (allowing for completely native use).
***Looking for suggestions/feedback!***
Please tell me any of your ideas/requests and I'll make them!