How do I exit Nano on Lish

S.O.S.
I am using chrome to open the Lish console. When I open it, I need to modify a file's text properties. So I use nano to open the file and change the text to what I need. This is where the problem is. When I try to close it using the ctrl+t or f12 buttons, it makes a new chrome tab. I already tried turning off the keybind by going in an manually disabling it, but since the popup is a chrome internal page it can't use extensions to disable the shortcuts. Please tell me someone knows how to solve this problem cause it's driving me a bit insane being stuck in a file browser.