Web Payments SDK example errors

sorry new users can only put two links in a post… why? basically I cannot post any errors I am receiving because of this…

example is not working out of the box… Using FireFox browser if that matters.
copied example here… https://developer.squareup.com/docs/web-payments/take-card-payment
I get this error…
JSON.parse: unexpected character at line 1 column 1 of the JSON data [square.js:2:38048]

Hi @brooksy, I just tested with the quickstart sample project and it worked on FireFox. What version of FireFox are you using and what is your application Id?