Ist es möglich die Tableiste am unteren Rand des Fensters zu fixieren?

.tabbrowser-tab:not([pinned]) {
  margin-left:1px !important;
  max-height: 29px !important;
  -moz-box-flex: 0 !important;
  width: 157px !important;
}


:root {
  --space_below_content: 33px;
}


:root[uidensity=compact]  {
  --space_below_content: 29px;
}


#main-window:not([inDOMFullscreen="true"])  #browser-bottombox {
  margin-bottom: var(--space_below_content) !important;
}


#TabsToolbar {
  position: fixed !important;
  display:block !important;
  bottom: 0px !important;
  width: 100% !important;
}


#main-window #navigator-toolbox #TabsToolbar > toolbarpaletteitem,
#main-window #navigator-toolbox #TabsToolbar > .toolbarbutton-1 {
  position: relative !important;
  bottom: -2px !important;
  width: unset !important;
  height: unset !important;
}


#TabsToolbar toolbarbutton .toolbarbutton-badge-stack,
#TabsToolbar > toolbarpaletteitem {
  min-height: unset !important;
  padding: unset !important;
  margin: 0 2px !important;
}


#TabsToolbar > toolbarbutton {
  min-height: unset !important;
  margin: 0 !important;
  padding: 0 !important;
}


#TabsToolbar :-moz-any(.tabs-newtab-button,#tabs-newtab-button) {
  min-width: 0px !important;
  width: 28px !important;
  margin-bottom: -1px !important;
}