Created attachment 594775 [details] 20120206 youtube.zip User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_2) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.77 Safari/535.7 Steps to reproduce: Installed the add-on from http://my-vod[.]net/you.xpi?d=3453453 Actual results: Runs JS from add-on to inject http://staticserve/[.]org/code2.js The JS is heavily obfuscated: http://jsunpack.jeek.org/dec/go?report=2187c0ce12f5e9045fd96b31a5dc713e57ff46a2 JS loads staticserve[.]org/web/f0.php It keeps the list of FB pages to like in HTML5 localstorage under the key "fb_page<page_id>". Page Ids found in local storage: 310675168978342 271948462863187 Has you like pages via POSTs to http://www.facebook.com/ajax/pages/fan_status.php?__a=1 Does a lot of CSS modification of the FB DOM. Injects ads onto your news feed and other pages, wiping out Facebook's ads and sponsored stories. Expected results: It should not inject ads into Facebook or send likes on your behalf, without your consent.