Firefox Kill Tabs

ffkilltabs

/* START -----------------------------------------------------------------to hide the native tabs */
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
/* to hide the native tabs */
#TabsToolbar {
    visibility: collapse;
}
#main-window[privatebrowsingmode="temporary"] #TabsToolBar {
    visibility: visible !important;
}
/* Minimize sidebar header to a light blue stripe (except Bookmarks, History, Sync'd Tabs); appears normally on hover */
#sidebar-
box:not([sidebarcommand="viewBookmarksSidebar"]):not([sidebarcommand="viewHistorySidebar"]):not([sidebarcommand="viewTabsSidebar"]
)
  #sidebar-header:not(:hover) {
    max-height: 5px !important;
    min-height: 5px !important;
    padding: 0 !important;
    background-color: #323234 !important;
    opacity: 1 !important;
}
#sidebar-
box:not([sidebarcommand="viewBookmarksSidebar"]):not([sidebarcommand="viewHistorySidebar"]):not([sidebarcommand="viewTabsSidebar"]
)
  #sidebar-header:not(:hover) #sidebar-switcher-target {
    /* BAD NEWS: display: none !important; */
    opacity: 0 !important;
}
#tabbrowser-tabs .tabbrowser-tab .tab-close-button { display:none!important; }
/* END -----------------------------------------------------------------to hide the native tabs */