No Conduit (aka Effective Brand) related extension has EVER been included with any Firefox install or setup from www.mozilla.org. In fact Mozilla mass removed them from the addons.mozilla.org hosting site a few times in past and then for some reason reluctantly allowed them of sorts there later on. A few old threads at the independent mozillaZine forums (before Sumo forums started) to show the headaches they were in earlier days especially. http://forums.mozillazine.org/viewtopic.php?t=500994 http://forums.mozillazine.org/viewtopic.php?t=451442 http://forums.mozillazine.org/viewtopic.php?t=465643 If you did not intentionally install this toolbar yourself then it could have been installed by another application you installed or updated recently as some have bundled Firefox extensions like conduit ones over the years. download dot com aka cnet for example is a known adware site that uses it own installer to bundle i crap to say least with otherwise clean programs. Firefox 34 from https://www.mozilla.org/firefox/all/ is completely clean and only comes with well Firefox whether for Windows, Mac OSX or Linux.