Following Fitts' Law and the rule of the infinite edges, it is much easier to click on a button if it is all the way at the corner or edge. Since there is effectively infinite area to click on.
All popular browsers do this. It is much more efficient.
The new design is a massive step back in that regard.

In full screen mode, it would be nice if all the tabs and other buttons(like the opera button and workspace buttons on the top left) would be moved all the way to the edges for easy selection.
The way it is now, it is a lot slower to use with a lot more required precision.

The gaps might look nice, to some people, but they make it much less usable.

@leocg Consider this a bug report then.
Opera One Version: 100.0.4815.2
Windows 10 Pro Version 10.0.19044 Build 19044

To reproduce it, all one has to do is put the browser in full screen mode and move the mouse cursor to the very edge of the screen. You are not able to select the opera button, the tabs, or the new tab button. Instead it just selects the browser window.
In normal opera, chrome, firefox, and any other browser you'd expect to be able to select it.

@ozzythewizard I didn't realize this was an issue with the scroll bar as well. I barely use it, but it is an issue too.

@ozzythewizard It used to be for all tabs if I remember correctly, but now it just seems to be tab islands...

@leocg Consider this a bug report then.
Opera One Version: 100.0.4815.2
Windows 10 Pro Version 10.0.19044 Build 19044

To reproduce it, all one has to do is put the browser in full screen mode and move the mouse cursor to the very edge of the screen. You are not able to select the opera button, the tabs, or the new tab button. Instead it just selects the browser window.
In normal opera, chrome, firefox, and any other browser you'd expect to be able to select it.

Following Fitts' Law and the rule of the infinite edges, it is much easier to click on a button if it is all the way at the corner or edge. Since there is effectively infinite area to click on.
All popular browsers do this. It is much more efficient.
The new design is a massive step back in that regard.

In full screen mode, it would be nice if all the tabs and other buttons(like the opera button and workspace buttons on the top left) would be moved all the way to the edges for easy selection.
The way it is now, it is a lot slower to use with a lot more required precision.

The gaps might look nice, to some people, but they make it much less usable.