Remember,especiallywithanonymouscontent,thattheyallhavethesameclasses!Thebadruleabovecausestheiconofeverymenutobecheckedtoseeifitiscontainedinthebookmarksmenuitem.Thisishideouslyexpensive(sincetherearemanymenus);thisrulenevershouldhaveevenbeencheckedbyanymenuotherthanthebookmarksmenu.
3.9、Use-moz-image-region!
Puttingabunchofimagesintoasingleimagefileandselectingthemwith-moz-image-regionperformssignificantlybetterthanputtingeachimageintoitsownfile.
OriginalDocumentInformation－Author:DavidHyatt
