Firefox Use the Silverlight plugin to play audio and video
Microsoft Silverlight is a plugin used by some websites to display multimedia content. This article describes how to check whether you have Silverlight installed, and if not, how to install it.
Table of Contents
Checking for Silverlight
To determine whether you have the Silverlight plugin installed, visit Microsoft's Silverlight installation page.
If Silverlight is installed, you will see a message with your Silverlight version, such as The version of Silverlight installed is: Silverlight 4.
Installing Silverlight
If you do not have Silverlight installed, follow the instructions on Microsoft's Silverlight Detailed Installation Instructions.
If you do not have Silverlight installed, follow the instructions at Go-Mono.com's Moonlight installation page. Moonlight is an open source implementation of Microsoft Silverlight for Unix-like systems.
Uninstalling Silverlight
To uninstall Silverlight, follow the instructions on Microsoft's Silverlight Uninstall page.
To uninstall a plugin, see Manually uninstalling a plugin.
Silverlight does not work in Firefox 4
Old versions of Silverlight may not work in Firefox 4 causing sites like Netfix to display a message giving you the option to "Restart in 32-bit mode". Clicking this restart button will make Silverlight work only until you restart Firefox again. To fix this permanently, please update your installation of Silverlight to the latest version using Microsoft's Silverlight installation page.
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