- Open a new Tab
- Type about:config in the URL or location bar and hit Enter.
- Accept the warning (if one appears)
- Change the value of the field to false by double clicking on the row
- Close the tab
You can re-enable it using the same steps above.
NoScript Security Suite
Ghostery, though similar to NoScript in blocking scripts has its priority on privacy. It disables trackers, web bugs and beacons if needed. It also has an easy to use interface which allows you to whitelist some scripts or some domains.