I admit, I've used only 2 tab managers, but I worked 30 yrs in systems + pc programming. This organizer is strange at best or the documentation need considerable improvement. Why will this add-on not simply save tab groups AND then open a selected group in FF one at a time without without loading every bookmark ever saved into the resulting group. It seems this manager is only good for simple tab group needs. Is there a command to save the current group and then reload a selected group into FF? I have not been able to do it after about 8 hrs effort.