The browser extension of Proton Pass currently only allows to auto-fill passwords with the iframe popup that appears over the login input fields. While this works fine, this popup is distracting and time-consuming to manually click it with the mouse.
Thus, I suggest to add keyboard shortcuts that can be customized in the browser settings. For me personally, autofill of the last used login-credentials for the current page would be the most important feature to get a shortcut, but password/alias generation or manual lock etc would also be nice to have as shortcuts, too.