The Serbian DNA Project Extension is a free Chrome add-on developed by Dragan Obrenović. It falls under the category of Browsers and is specifically listed as an Add-ons & Tools subcategory.

This extension provides additional information and tools for members of the Association of Serbian Genealogists "Poreklo" while browsing the results in the Serbian DNA Project's database. It offers two main features:

Firstly, it displays the haplogroup age and TMRCA (Time to Most Recent Common Ancestor) as a tooltip when hovering the mouse over a haplogroup's name. It also provides a direct hyperlink to the YFull tree of that haplogroup, allowing users to explore further.

Secondly, it offers a genetic distance comparison feature that enables users to quickly discover the genetic distance between a selected individual and other tested people shown in the table.

Overall, the Serbian DNA Project Extension enhances the browsing experience for members of the Association of Serbian Genealogists "Poreklo" by providing them with additional information and tools while using the Serbian DNA Project's database.