duplicate of https://support.mozilla.org/en-US/questions/1177711 When Mozilla Fiefox upgraded a few days ,it stopped the "Add to Cart " Paypal buttons from working on my websites. www.rickysounds.co.uk and www.ricsrus.com. My customers have been emailing me and saying they have the same problem. trying to use the buttons generates a Paypal screen that says " THings don't appear to be working at the moment, Please try later.(tried to upload an image but it wont upload to this page.) Google chrome and Safari work correctly so I reinstalled Mozilla Firefox 54 and this version works perfectly. I tried to use my PC laptop and the latest FirefoxPC version has the same problems ,again IE on the laptop works perfectly. I am losing business as a result of this problem so I would appreciate a fast resolution to the problem