hbox ├ sidebar-box │ ├ sidebarheader │ └ browser └ appcontent ├ tabbrowser / gBrowser (tabbrowser.xml#tabbrowser) │ ├ stringbundle / gBrowser.mStringBundle │ └ tabbox / gBrowser.mTabBox │ └ tabpanels / gBrowser.mPanelContainer │ └ notificationbox │ └ stack │ └ browser └ statuspanel
toolbar ├ tabs / gBrowser.tabContainer (tabbrowser.xml#tabbrowser-tabs) │ └ arrowscrollbox / gBrowser.tabContainer.mTabstrip │ ├ scrollup │ ├ scrollbox │ │ ├ tab │ │ └ newtabbutton │ └ scrolldown ├ newtabbutton ├ alltabsbutton │ └ alltabs-popup / gBrowser.tabContainer.mAllTabsPopup └ closebutton / gBrowser.tabContainer.mTabstripClosebutton