Firefox can now automatically fill Credit Card information on web forms for you, CVV will not be saved. You can password protect your credit card data saved to Firefox, where you need to enter Windows/Mac Password to edit or view or autofill stored Credit cards. Mozilla claims the feature will be available starting with Firefox 79 to En-US users.
Like Chrome, Mozilla is also introducing web payments or Credit Card Autofill in Firefox the “Privacy and Security” section under “Forms & Autofill”.

Turn on Credit Card autofill in Firefox
1. Launch Firefox 80 Nightly
2. Visit about:config
3. Search for “autofill”, toggle below preferences value to true.

extensions.
extensions.
4. To prevent your Credit Card info from being seen by others, you can make Firefox prompt for the OS password by visiting Settings > Privacy and Security > Forms autofill, select “Require Windows authentication..” checkbox.
Windows: Firefox doesn’t prompt for a password if you’ve not set one for Windows.
Mac,: If you’re not using a password, click OK, two times to continue.
To edit or Add new Credit Cards
1. Visit Settings > Privacy and Security > Autofill and forms
2. Click “Saved Credit Cards”
- Click the “Add” button to enter a new credit card.
- The “Edit” button lets you make changes to Credit Card you’ve selected.
- .Click the “Remove” button after selecting a credit card you want to delete.
3. After making changes, click X to save them.
To disable the Credit Card autofill feature in Firefox
- Visit Settings > Privacy and Security
- Under Forms and Autofill,
- Uncheck “Autofill Credit Cards”.
When was the last time, your browser auto-filled credit card information for you?
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