Hi, Please consider turning on send info to Mozilla from with in Firefox before posting a question. This helps us help you. I have no info from your system that would help see things that cause issues. I would think it is a cookie issue that settings need to be adjusted or your adblocker/s turned down or off. There are several Anti-Virus programs that can cause issues : There is security software like Avast, Kaspersky, BitDefender and ESET that intercept secure connections and send their own certificate. Update if have them, Go to their Community Forum Page to see if others have issues. *https://support.mozilla.org/en-US/kb/fix-problems-facebook-games-chat-and-more You can try removing Flash : *https://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Then reinstall : Flash Player Version: 29.0.0.171 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only>