why the tabs in firefox give the same window id using xwininfo

[Wichmann, Mats D]

> i used xwininfo to get the windows id..
> when i used xwininfo on mozilla firefox browser 
> with more than one tab opened it is giving the 
> same window id for any tab with in that window.
> why it is giving the same window id for all the 
> opened tabs with in that window is it possible 
> to know why it is..

Because tabs all appear in the same window.