firefox plugin

I need an firefox plugin made. This will POST to my server for every webpage the url, browser, and country of origin. In return for the url I will hand back a url to use as a pop-under ad or return nothing at all. The client then should open up this url as a pop-under ad. The current url should be blacklisted for 8 hours to ensure that the ad does not pop up again in that time frame for that particular webpage. Every time a user clicks on the ad and sees it that information should be sent back to the server to be recorded. You may choose whether you wish to send this information every couple of hours or send it back immediately. The client should be able to change it's file signature upon every install to ensure that it's not easily detectable by anti-adware software. This should be very easy work for anyone who has made firefox plugins before. I would like for the plugin to NOT be visible within the plugins menu and to avoid common software such as ad-adware, and spybot s&d. This probably requires it to use xpcom rather than the simple javascript/xul based plugins but I'll leave that discretion to you. I need this to work on all firefox 2.X branches as well as the later 3.X branches. I need this to work on windows xp, 2k, vista, win7, etc. This software will be bundled with other software so keep that in consideration. ## Deliverables there will be much more work available for the right coder if this is done right