Download the current version of Silverlight. Double-click on Silverlight.dmg in your browser's Downloads menu. For Safari, the Downloads menu is in the upper right corner of the browser. For Firefox, Downloads is a separate window located in the Dock. Double-click on Silverlight.pkg. Follow the installation prompts. Close and reopen your browser and try Netflix again.
Silverlight For Mac Os X
Microsoft Silverlight For Mac
Firefox version 52 ESR Win XP OS. Silverlight plug-in stopped working just yesterday on Netflix and my Win XP Pro OS. I have uninstalled the older version and downloaded the correct version I need 5.1.4.1.2 and it is installed but still doesn't work with Netflix. I cannot find in the registry Netflix and Silverlight permission to run the plug in. This is a problem and needs to be fixed. I don't have the money or means to upgrade my OS at this time. I have no tv either. I have been in contact with Microsoft and Netflix and they determined that the problem lies with Mozilla. I cannot use any other browser as Chrome does not work with Netflix and Win XP either due to unable to update WidevineCdm on XP.