This is by far the coolest add on for Firefox that we have seen. This add on is called firefound and can be found here
https://addons.mozilla.org/en-US/firefox/addon/51329
Once you have installed this add on and have restarted your firefox you have to chose a username and password. After this is done you can simply browse to www.firefound.com and log in using this username and password. The page will immediately show the last known location of your laptop!!
