edit firefox cookie settings via shell script on ubuntu 14?

I want firefox to not erase cookies on browser close. I want to set this via a script. Below are gui based instructions for the goal settings.

Anyone know how to do this?

Thanks!

Firefox

At the top of the Firefox window, click the Firefox button and then select Options
Select the Privacy panel
In the History section, set Firefox will: to Use custom settings for history
Select the check box for Clear history when Firefox closes
click the Settings… button. The Settings for Clearing History window will open
In the Settings for Clearing History window, click the check mark box next to Cache.
Click OK