Cookie Handling Problem in Firefox 2.0

I was just listening to the latest episode of Security Now! in which it was pointed out that the new Firefox 2.0 does not have an option for automatically blocking third-party (i.e. advertisers) cookies. Looking at the Privacy options screen I was quickly able to confirm this.

However, you can still do this but you must edit the setting manually. Here's how to do this in a few simple, illustrated steps.

First, type about:config in the address bar and then type cookie into the Filter: field. Find the line titled network.cookie.cookieBehavior, right click on it, and select Modify.

In the Enter integer value box, replace the number 0 with the number 1 and click OK.

When done, the network.cookie.cookieBehavior line will be bold, the Status will be listed as "user set" and the value will be "1". You are now blocking all third-party cookies.