Thanks, Cory! On second look, I see that the tabs still exist, but I cannot access the favorites by clicking on a + sign at the extreme right of the tab line, which was my preferred way to add a tab. For instance, if I was writing some text, I could go to Favorites > search engine and then click back on the tab of origin to return.
But I can delete some of the existing tabs by clicking on the x that appears at the extreme left of each tab, same as in the past.