Hmm, ebates says they support Firefox: https://www.ebates.com/help/article/supported-browsers-115009257328 Their support page says to make sure that www.ebates.com cookies are allowed. Do you block any cookies, such as "third party" cookies? This article describes how to check on the relevant Firefox settings: [[Websites say cookies are blocked - Unblock them]] Of course, there also are many, many add-ons that affect cookies and third-party cookies...