Disclaimer: Boring Video.
Java just released a new version of Java 1.7.0_40 (188.8.131.52). If you had problems getting java to work on Firefox 22 for Windows 7, then try reinstalling Java.
If that didn’t work, then you can check in Firefox to make sure the add-on is running.
1) Go to menu bar
2) Select “Tools” and then “Add-ons” ( or you could press Ctrl+Shift+A)
3) On the left select Plugins
4) On the right scroll down to find Java entries like “Java(TM) Platform SE 7 U40”
5) IF button on…