![](http://1.bp.blogspot.com/-vNYgIeAuSPA/UnN-NERZcgI/AAAAAAAAAfg/Q6XHS1rPZ-g/s1600/firefox23+.png)
In Firefox 22 you easily disable and enable Javascript by going to TOOLS > OPTIONS > CONTENT then just uncheck "Enable Javascript" but in Firefox 23+ the option to disable Javascript and the Advanced Javascript setting were removed from Firefox Options window.