After installing Apple’s newest Safari 15 update, many Mac users quickly noticed that it’s too damn difficult to identify which tab is active. It’s one of the biggest complaints (on a list of many) regarding the browser’s big redesign.

But there’s an easy way to fix it. One developer has created a simple Safari extension called ActiveTab that makes it much easier to see which tab you’re currently using at a glance by drawing a customizable colored line beneath it.