First time I tried to set up two-factor authentication, on the final step the screen displayed like this - the overlay window was super tiny. I couldn't click or see anything. Reloaded the page to fix, but then the whole process was cancelled and I had to re-enable two-factor authentication. Second time it displayed ok. Screenshot attached. Note sure if this would be browser related or evernote problem. Firefox 51.0.1. Just sharing in case anyone runs into a similar issue.