You can move the New Tab button on the tab bar either to the far left or the far right next to the List all tabs button if you do not want it to appear after the last tab. You can also double click in empty space on the tab bar to open a new tab.

Yeah, I know that. But the thing is, in previous versions, the + icon was part of the GUI.

Now the + icon is, in fact, the "new tab" button.

So you have to choose between 2 options, or have it as the + button in the tabs bar, or having it as a normal button in the toolbar.

I don't understand why they modified this. Or at least, have the "new tab" button available even when you have the + button next to the tabs.