If you’re frequently making purchases online, your transactions will go a lot faster when the browser can autofill your credit card details. To save a new payment method, simply click “Save” in the dialog when prompted during a purchase process.

To add a new card manually:

1. Go to Settings > Privacy and Security > Payment Methods.
2. Click “Add New Payment Method”.
3. Enter your card’s details.
4. Click “Save”.

Learn more about autofilling paymenth methods on Vivaldi Help.