[tab.parent.a] [tab.child.a] [tab.grandchild.a] [tab.b] in this order.

I like to know is there a mod to fix the tab closing behavior. I'll try to describe as best I can. 1. Lets start with 2 opened tabs [tab.parent.a] and [tab.parent.b] 2. Opening a link from [tab.parent.a] creates a child [tab.child.a] 3. Opening a link from [tab.child.a] creates a child [tab.grandchild.a]. So the current tabs are: [tab.parent.a] [tab.child.a] [tab.grandchild.a] [tab.b] in this order. 4. If I close [tab.grandchild.a] it returns me to its parent tab which is [tab.child.a] , the correct behavior. 5. However, now when I close [tab.child.a] it returns me to [tab.parent.b] not its parent [tab.parent.a] Is there a way to modify the closing behavior so that closing each sub-child tab will return it to its originating parent? Maybe and add-on already provide this behavior but I haven't located yet. Any help would be appreciated. Thanks in advanced.