macOS Safari has vertical tabs

I have no clue when it started, but I only found out this morning that Safari 16.1 (macOS 13 / Ventura) can do vertical tabs.

Maybe this is old news to you, but maybe some of you are as unaware as I was, so I am sharing this here.

Steps (updated):

  1. Show Sidebar
  2. On the top of the Bookmarks sidebar, there is a “<” button to the left of “Bookmarks”; click the “<” button
  3. You will see tab grouping; click the “>” character (button)
  4. The tabs are listed vertically in addition to the horizontal tabs