Issue with Protonmail Decrypt mailbox input field

Protonmail uses 2 password fields with the same URL, and on page 2 I need to enter decrypt mailbox, but as I have 2 entries for that site Kee dont autofill it, and as they have a show/hide password, this button is “above” the Kee button in Firefox so I cant click it.

Is there a way to “record” a login so it can figure it out itself?

Ctrl-Shift-2 on the keyboard or click the “Matched logins” button in the main popup panel.