We're working on improving the autofill for all web services reported by our community. Please feel free to flag any problematic web services or apps to us either by editing your review or by contacting us at https://proton.me/support/contact, and we'll note your feedback for future improvements. We'll share your feedback regarding the ability to lock the extension. Also, we're working on adding biometrics to the extension. Thank you for taking the time to review our app!