How to enable JavaScript in Firefox?

Enable JavaScript in FIREFOX

1. Type into the address bar: about:config. Press Enter.
2. If a warning message appears click on "I' accept the risk".
3. In the top is a search box. Type here javascript.enabled.
4. Toggle the javascript.enabled preference. You can do it by right-click, select Toggle or double-click the preference.
5. Change the value from false to true.
6. Restart Firefox.