@leocg If to go to a new tab whilst in full screen, I have to: Ctrl+T and F11. That's a flaw that needs to be fixed, or I have to Ctrl+T plus whatever the shortcut is to go to the new tab I just opened; that's a flaw that needs to be fixed.
Take Microsoft Edge for an example: I use full screen. I press Ctrl+T, it opens up and goes to the new tab. If I want to go to a different tab, I just go to where my tabs are, and they're brought down so I can select one of them.