Firefox 22 Content menu
Firefox 23 Content menu
Side-effects of the change
The advanced options are not gone, they are also listed in the about:config dialog.
You find other options listed here as well. Just type in dom.disable or dom.event to take a look at those.
Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.