ActiveTab is an extension that clearly shows which Safari 15 tab is active
(iMore iPhone)

What you need to know Safari 15`s tab layout can make it difficult to tell which is active. A new Safari 16 extension makes it easier to tell which of your tabs is the active one by putting a strip of color beneath it. Apple`s finding new ways to support developers. Apple`s latest Safari 15 release is available for current macOS releases right now and will be shipped pre-installed on all macOS Monterey installations soon enough. And while the browser has improved since its early beta days, it still has its issues — like not being able to discern which tab is active when in the `Separate` tab layout mode — the only mode anyone should be using! Now, a new extension by the name of ActiveTab is here to save the day. Available from the App Store, the Safari 15 extension puts a custom bar of color beneath the tab that`s active, making it immediately obvious which that might be. Users can select how thick they want the bar to be and there`s an option to select from multiple differ...