Be careful if installing this.. the default number of tabs is 2, and if, as in my case, you are trying this out because you were driven to finding a tab limiting tool because you have some hundred open tabs that you have lost track of and wish to regain some control, you must be prepared to have all of them but two closed *with no warning* the first time you activate this extension, irrespective of whether you needed the tabs or not. Insane.. how can an extension unilaterally close all tabs and leave you with no option of recovering them? And to top it, the app makes a bunch of annoyingly loud and weird sounds as it closes your tabs. There is no point of providing options to set the number of tabs or controlling sound after having done the damage. An extremely inconsiderate app.