Keyboard check
Press every key and watch it light up. Find the dead ones, the stuck ones, and the ones that type twice.
This needs a physical keyboard. Connect one, or open this page on a computer.
Press Esc to stop testing.
So far
Your keyboard has the extra key next to left Shift, so it’s probably ISO: try that layout.
Findings
Windows keeps the Win key and Print Screen partly to itself, and Fn never reaches the browser.
Alt+F4 and Ctrl+W still close the page, so leave them out.
Widen the window to test the number pad too.