In safari, there is the ability to add a text name or label to a saved credit card. This is useful if you have many cards and can't remember or don't want to memorize which number corresponds to which card. This would be great to add to firefox
There are occasions where you use credit/debit card number and generated random email alias to login certain websites. A feature to set nicknames for saved login/password would be great to identify the login information easily.
There is a developer discussion at the link below which seems to indicate a fix was at least in the testing phase a year ago, but it still hasn't made it to production:
When you have more than 20 credit cards, managed for three different people, having a "nickname" is crucial so you can make the correct card choice. It is really difficult to try and remember the ending numbers for this many cards when most other payment saves allow a nickname field!!!!
s'il vous plait, à la rigueur, juste un petit champ en texte libre : les utilisateurs trouveront bien comment en faire bon usage pour retrouver facilement la carte recherchée. c'est exaspérant de devoir comparer ces numéros enregistrés à ceux de nos différentes cartes ...
please, at the very least, just a small free text field: users will be able to figure out how to make good use of it to easily find the card they are looking for. it's exasperating to have to compare these registered numbers with those of our various cards ...