The .NET Framework Assistant is an extension for enabling the use of Microsoft's ClickOnce technology in Firefox.

This extension was installed by Microsoft on some systems via a system update. It is also available from addons.mozilla.org.

Disabling the .NET Framework Assistant

1. From the Tools menu select Add-ons.
2. Click to select the Extensions panel.
3. Click to select the .NET Framework Assistant entry.
4. Click Disable.
5. Restart Firefox.

Uninstalling the .NET Framework Assistant

To uninstall .NET Framework Assistant extension, see How to remove the .NET Framework Assistant for Firefox at Microsoft's website.

Enabling the .NET Framework Assistant

Due to a potential security vulnerability, the .NET Framework Assistant was recently blocklisted temporarily by Mozilla.

The security vulnerability has since been addressed. To re-enable the extension:

1. From the Tools menu select Add-ons.
2. Click to select the Extensions panel.
3. Click to select the .NET Framework Assistant entry.
4. Click Enable.
5. Restart Firefox.