Java is not working but it is installed and it is not blocked.

I'm unable to access most websites - the one error message that I've received says: It appears that software on your computer is blocking JavaScript. To enjoy Hulu.com, you'll need to enable JavaScript in your web browser. Please configure your security software or browser plugins to allow Hulu.com to load JavaScript. I re-installed Java and there is no Java software being blocked so I don't understand why Firefox is not loading the pages. hulu.com, wordpress.com, facebook.com