I'm trying to set up a TamperMonkey script to reassign the `Right Arrow` key to `F` key.

I tried this code, but so far, nothing happens when I press `F`.

```
    (function(){
document.addEventListener('keydown', function(e) {
 // pressed F
  if (e.keyCode == 70 && !e.shiftKey && !e.ctrlKey && !e.altKey && !e.metaKey) {
  keyCode == 39 // this should trigger the right arrow
  }
}, false);
})();

```

Can someone enlighten me on this, please?