Please see if
this article and the
NoScript Privacy Policy provide any helpful info on this issue.
IIUC, you're using a static IP, and want that entered as engaging ABE's protected LOCAL resource more or less permanently.
The
about:config entry,
noscript.ABE.wanIpAsLocalis Boolean only; no place for a string entry.
Corrected post: If the WAN detect site can detect only the IP of the exit node, then yes, it seems that you are forfeiting this feature of ABE.
I'll see if Giorgio has anything to add.
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.28) Gecko/20120306 Firefox/3.6.28