Just today, I have noticed that Javascript, and anything related to Java will not run on Firefox. I've looked far and wide, uninstalled JavaFX, reinstalled Java 3 times, attempted everything, but no matter what, Java will not work and Firefox will report the Applet is running fine.

I'm running the latest version of Firefox, along with Java SE7 U17, which is the latest version of Java. Is there any way to fix this? Also, Java has also ceased to work on my computer itself, but it is most noticeable on Firefox where I can't use scrolldown menus, or view videos that require Javascript (It either prompts me with "Plugin/file not found" or it simply doesn't load). I can still view YouTube videos.