hello, yes this is a phishing tactic that is trying to trick you into installing malware, so don't download or execute this kind of stuff! updates are handled automatically by firefox so you don't have to download anything. please also do a [[Reset Firefox – easily fix most problems|reset of firefox]] since some of your extensions look quite suspicious. you might also want to run a full scan of your system with the security software already in place and different tools like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes], [http://www.bleepingcomputer.com/download/adwcleaner/ adwcleaner] & [http://www.kaspersky.com/security-scan kaspersky security scan] in order to make sure that there isn't already some sort of malware active on your system that triggers these false alerts. [[Troubleshoot Firefox issues caused by malware]]

You also can cleanup your extensions and uninstall or delete disabled and unneeded extensions that were possibly install globally. Your above posted system details show multiple Java Console extensions.<br /> You can uninstall and remove Java Console extensions, you do not need them to run Java applets. See: * http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions See also: *http://kb.mozillazine.org/Uninstalling_add-ons *http://kb.mozillazine.org/Uninstalling_toolbars