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: https://bugzilla.mozilla.org/show_bug.cgi?id=1443042
Definitely could use this feature. Came here to suggest it and glad to see it here. Right now I have a list of cards for different purposes and while I recognize a few from frequent use, others are really hard to differentiate when needed. A nickn...