A disaster in every respect! The homepage of the expansion reveals the truth. The link to the developer's homepage leads to a page with casino games. This expansion in no way deserves the minimum rating of one star.

This is a scam. it installs other add-on Blured tabs. and the developer is a gambling site. kind of games.

Adds 'blurred tab', which does nothing

When initiating the installation, Smart Tab Sorter instead offers to install another extension named "BlurredTab".