In October 2009, Mozilla decided to add Microsoft’s Windows Presentation Foundation (WPF) plug-in to the Firefox blocklist after Microsoft revealed that it had a vulnerability.

Mozilla can add extensions or plug-ins to the Firefox add-on blocklist if they cause significant security or performance issues.

If you're still using Java and Firefox, make sure you're on browser's the latest version to be protected from the most recent vulnerabilities in the plugin.

In a post to Mozilla’s Firefox Add-Ons blog, Mozilla channel manager Kev Needham said the vulnerability “is actively being exploited, and is a potential risk to users.” ...

Mozilla is aware of a security vulnerability in the current version of Java (Java 7 Update 10) that is being actively exploited and affects any browser using the Java plugin. Firefox users may be ...

The steps are simple: click on the Firefox button (Tools menu in Windows XP), click Add-ons, click on the Plugins panel, click on the Java (TM) Platform plugin, and click on the Disable button.

Mozilla has blacklisted unpatched versions of the Java plug-in from Firefox on Windows in order to protect its users from attacks that exploit known vulnerabilities in those versions. Mozilla can ...

Mozilla has added Java to the blocklist of malicious apps in the Firefox browser because older versions of it are being exploited in attacks.