Apple will bring many interesting changes to the new Macos Monterey, but some of the Schimabri have caused heated discussions in the communities of Mac users.
One of the changes that generated discussions is the new ui al Safari 15 pe macOS Monterey. In the first beta versions came with the tabs in a mod compact, thus eliminating address bar, each tab can play this role. This feature was introduced without users being able to return to the "separate" mode in which the active tab is in a dedicated address bar.

Along with the macOS Monterey 12 Beta 4, Apple has returned and introduced the possibility of users in Safari to choose how to display TABs.
"Compact"Or"Separate" tab layout.

In the "separate" mode the tabs will look approximately the same as before the update.

The option by which we can change how to display TABs in safari 15 is deleteable in: “Preferences” → “Tabs” → “Tab layout“.
Besides this change of UI, Safari 15 also comes with a new TAB group system and a new layout for the sidebar.
It should be mentioned as users of Catalina macOS who will install safari 15 will not have the new IU with "compact" and "separate".