When Apple released the macOS Monterey beta, one of the things the company changed was removing the tabs bar in Safari. Engadget pointed out that it made sorting tabs messy and tedious, even if it allowed for more screen space to website content. Apple listened to users and brought back the standalone Tab bar with the latest macOS beta update. It will be enabled by default like it was on Big Sur.
The update also brings one-click access to controls like Reload and Sharing. You can also access new features like Tab Groups from the toolbar. You can still use the thin menu, but Apple refined this feature to make it easier to see page titles even when adding more tabs. The changes will also make their way to iPadOS in a future beta update.
As for iOS 15, it will be easier to use Safari with one hand. When entering a search, the field will now appear above the keyboard. It's nearer the bottom of the screen and easier to edit if needed. You can dismiss the keyboard by swiping down on it. Apple also brings the Reload feature to the long-press menu on the left side of the tab bar.