Mozilla has added Java 7 Update 7 to its add-on block list after it found the plugin vulnerable. This means, if you have Java 7 Update 7 installed on your computer (be it Windows, Linux or Mac), Firefox will automatically block the Oracle Java plugin.
Oracle Java 7 Update 7 is admittedly not the latest version of Java, as of now, that is, November 24, 2012, Java 7 Update 9 is the latest version available for download and install. So, if you want to re-enable Java on Firefox, you need to download the latest version of Java and install it.
According to Mozilla, Java 7 Update 7 plugin poses a serious risk to the users and thus it had to add the plugin to its blocklist. Mozilla further states that the discovery of the critical security hole in the plugin potentially allows attackers to compromise user’s system, and the bug is currently being exploited in the wild. [Read more...]