current/css/toolbars/additional_bookmarks_toolbar_below_navbar.css
/* Firefox userChrome.css tweaks ********************************************************/
/* Github: https://github.com/aris-t2/customcssforfx ************************************/
/****************************************************************************************/


#main-window:not([customizing]) #nav-bar:has(#personal-bookmarks) {
  padding-bottom: 26px !important;
}

/* reduce maximum width of location bar and search bar on navigation toolbar */
#main-window:not([customizing]) #nav-bar:has(#personal-bookmarks) :is(#urlbar-container, #urlbar, #search-container, #searchbar)  {
  min-width: 50px !important;
}

/* move bookmarks to empty space below navigation toolbar, if on navigation toolbar */
#main-window:not([customizing]) #nav-bar:has(#personal-bookmarks) #personal-bookmarks {
  position: absolute !important;
  display: block !important;
  /*bottom: 0px !important;*/
  min-width: 0 !important;
  width: auto !important;
  max-width: 100vw !important;
}

#main-window:not([customizing]) #nav-bar:has(#personal-bookmarks) #personal-bookmarks {
  margin-top: 37px !important;	
}

#main-window:not([customizing])[uidensity="compact"] #nav-bar:has(#personal-bookmarks) #personal-bookmarks {
  margin-top: 32px !important;
}

#main-window:not([customizing])[uidensity="touch"] #nav-bar:has(#personal-bookmarks) #personal-bookmarks {
  margin-top: 41px !important;
}

/* reduce size of bookmarks 'more bookmarks' menu chevron and remove its background color on navigation toolbar */
#nav-bar:has(#personal-bookmarks) #personal-bookmarks #PlacesChevron .toolbarbutton-icon {
  min-width: 0px !important;
  min-height: 0px !important;
  width: 16px !important;
  height: 16px !important;
  padding: 0 !important;
  margin: 0 !important;
  /*background: unset !important;
  box-shadow: unset !important;*/
}

/* set minimum height for bookmarks, when on navigation toolbar */
#nav-bar:has(#personal-bookmarks) #personal-bookmarks toolbarbutton.bookmark-item:not(.subviewbutton) {
  min-height: 24px !important;
}

/* adjustments */
#nav-bar:has(#personal-bookmarks) #personal-bookmarks {
  min-width: 40px !important;
  width: auto !important;
  max-width: 100vw !important;
}

#nav-bar:has(#personal-bookmarks) #personal-toolbar-empty-description,
#nav-bar:has(#personal-bookmarks) #personal-bookmarks toolbarbutton.bookmark-item:not(.subviewbutton) {
  padding: 0 2px !important; 
}
