Please don't keep your users in this hack limbo. Users want tabs on bottom (tabs under address bar). This feature is essential to a community of users that utilize browsing during their jobs. Its a quicker reference for those who must switch back and forth between pages at a quicker rate. This Firefox/modzilla movement to disable these types of add on(s) is why more and more people are switching to Chrome for their customization needs. Which is more support robust and community supported. This is my last attempt before I switch over to a new browser myself. I just cant keep writing code every update you make.