Issue #2886904 by jhodgdon, andrewmacpherson, volkerk, Eric Heydrich, Vidushi Mehta, Utkarsh_Mishra, jenlampton, hosef, anavarre, adriancid, xjm, alexpott, mgerbault, tracipotocnik, BSpeel, yoroy, lauriii: display: block for details/summary hides drop arrows in Firefox (normalize.css update)

Issue #2574797 by kostyashupenko, dschenk, zuhair_ak, ckrina, emma.maria, tomgrandy, lucastockmann, Cottser, templeman, edwdeapri, BSpeel: Bartik: Site title lays over the menu block