If you are unable to update it, or for some reason you need to use the a blocked version of the plugin, it can be enabled again in the Add-ons Manager, in the Plugins pane. To avoid the block, we recommend that you visit the Silverlight page and update your Silverlight plugin to the latest version. The affected versions – all versions older than 5.1.0 – will be disabled.

We did this because these versions of the plugin are causing instability in Firefox, including crashing on popular sites such as Hotmail. The Updates tab of the Microsoft Silverlight Configuration dialog box enables you to specify when to check for, download, and install Silverlight updates.Old versions of the Silverlight plugin for Mac OS X have been added to the Firefox add-on blocklist. Why are some settings unavailable?Ĭertain computer configurations can disable features of the Silverlight auto-updater. The following sections describe the configurations in which the specified options are not available.

'Install updates automatically' option not available.

If you are using Windows Vista and User Account Control (UAC) is enabled, then Silverlight will require your permission to download and install updates. Silverlight asks for your permission to update by showing you a prompt when updates are found.

You can still receive updates by selecting the Check for updates, but let me choose whether to download and install them option or by using Because a prompt is required, updates cannot be installed automatically, so the Install updates automatically option is disabled. To update Silverlight and other Microsoft products. 'Install updates automatically' and 'Check for updates' options not available. The Microsoft Silverlight auto-update feature depends on several Microsoft Windows components being up to date. If these components are outdated then you will not be able to select either of the auto-update options. If you have installed all critical updates and these options are still not enabled, then you will need to uninstall Silverlight and then install the latest version from the You can enable automatic updates by visitingĪnd installing any critical updates which you are missing.

Updating silverlight on mac