Things needed:
A brain
FireFox
1.In the bar that you have to type a URL in, type about:config
It should look like this:
2.Change values to the following
This thread is nine months old..
On top of that, you took more time to type that post than it would have taken to find what you were looking for, plus you have to wait for a reply. That's terribly inefficient and illogical.