Focus creates so many problems. The one the always gets me is when an authentication code gets sent to my phone. I go back to the page to enter that authentication code -- carefully poking each digit on my keyboard -- only to discover that none of the digits were entered into the web page, because you need to first click on the digit-entering window, or whatever you type isn't accepted.

And there's one site where when I pull up a new web page and try to scroll down to read the first line of its article -- I can't, because focus for some reason is on their sidebar.