Can these cards be used for real payments?
Can these cards be used for real payments?
No. Payment Sandbox Helper is intended only for PayPal Sandbox, Stripe test mode, and local development. The values must not be used on production checkout pages or for real purchases.
Are generated card numbers real?
Are generated card numbers real?
No. Random card numbers are generated locally with a valid Luhn checksum and appropriate network prefix. A valid checksum only makes the number structurally valid; it does not represent a funded account.
Why is a generated card rejected by the sandbox?
Why is a generated card rejected by the sandbox?
A provider may require one of its documented static test cards or a specific account configuration. Select a scenario designed for the current provider rather than assuming every Luhn-valid number will be accepted.
Why did automatic fill miss some fields?
Why did automatic fill miss some fields?
The page may use different selectors, a custom component, or secure cross-origin iframes that content scripts cannot access. Confirm that the hostname is supported, then copy and paste any missing values manually.
Which sites can the extension access?
Which sites can the extension access?
The current content-script matches cover PayPal, PayPal Sandbox, Stripe, localhost,
127.0.0.1, and *.appspot.com. The manifest does not declare access to every website.What do PayPal error triggers do?
What do PayPal error triggers do?
They supply provider-specific values used to exercise declined or validation-error paths in PayPal Sandbox, such as insufficient funds, expired card, suspected fraud, or CVV failure.
Where are my settings stored?
Where are my settings stored?
Country, cardholder name, card backgrounds, and other preferences are saved in browser extension storage on the current browser profile.
Does the extension collect payment data?
Does the extension collect payment data?
The project is a test-data helper and the Firefox manifest declares no required data collection. Do not enter real card data into the extension or use it on production payment pages.
Does it support Chrome and Firefox?
Does it support Chrome and Firefox?
Yes. Chrome uses the Manifest V3 side panel, while Firefox uses its sidebar action. Build commands and installation steps differ slightly by browser.
How do I report a problem?
How do I report a problem?
Open an issue in the Payment Sandbox Helper repository. Include the browser, extension version or commit, provider, test page type, expected behavior, actual behavior, and redacted screenshots. Never publish real card or customer data.