OMFG! Ok, let me explain. The exploit was based off three HTML files that were executed through an iFrame. They each activated the others so that even if you prevented one from loading initially, it would simply become loaded by the other files. These HTML files were made with the express purpose of inserting code into the ram through an exploit found ONLY in Windows NT with Firefox 17 (same version as the TOR Browser Bundle as well as Firefox ESR). Windows NT as in Windows versions with the NT Kernal (XP, Vista, 7, and 8) The exploit is patched in Firefox 18, as well as in Firefox 17 on all other OSes (GNU/Linux, Android, Mac OS) so that's why it only affects Windows NT users. Not because the code was in .exe format or something of that nature, but simply because that is the only version that was still called "current" for the TBB that had not received the JS patch.