Attempting to edit currently saved credit card information does not work. Steps to reproduce: Navigate to "Privacy & Security" in Settings (about:preferences#privacy) Scroll down to "Forms and Autofill" Click "Saved Credit Cards..." button Click on saved credit card info to select a card -Observe: Selected line item highlights blue Click "Edit..." button Result: Nothing happens. "Edit..." button darkens and lightens to show that the UI element is active, it just doesn't produce any result. Selected credit card line item highlight changes from blue to grey. Clicking "Edit..." button again does nothing. User cannot edit saved credit card info. "Add..." button presents a new modal when clicked, but "Edit..." has no result.