autocomplete cc-number is not being autofilled

I've made a related feature request to include an option to force Firefox to give the option to autofill any arbitrary field as a credit card, address, whatever. This is because 9 times out of 10, Firefox either fails to recognize a field and doesn't offer an autofill option, or something else is going on. If I was able to right click on an empty field and select, "Fill from credit cards," this would solve my problem. I inspected some of these elements and see that they seem to contain the correct type of markup, with the proper autocomplete="cc-number" attribute. So why is Firefox not recognizing that field? Why is it not popping up an option to autofill? tl;dr: there is no option to autofill even on correctly marked-up forms. Nothing pops up. My credit cards are stored correctly, I'm logged in as the correct user, the feature works on *some* checkout forms, just not most of them. edit: I don't know how to delete this. turns out this is a known bug on firefox on linux. Firefox cannot actually save payment info, but doesn't serve an error to the user. however in the console it will throw a NS_ERROR_ABORT error: "User canceled OS unlock entry" error when it tries to save. the one solution i looked at seemed way too complicated for me so i am simply going to give up and try to keep my cc closer to me and not get frustrated when it doesn't work.