How to disable javascript, images in Firefox 23?

After updating to firefox 23, Javascript, Images enable/disable tick box missing in Tools -> Options (Content).

How to disable it?

Forums

You can disable JavaScript / images from loading either by using Firefox add-ons or by modifying configuration.
See this post for detailed information:
How to disable JavaScript, images in Firefox 23?
Disable JavaScript, images in Firefox 23 without using any add-ons