@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
spacer.progress-bar,progressmeter{-moz-appearance:none!important}
spacer.progress-bar{background:red!important}
progressmeter[value="0"]{background:#FFF!important}
progressmeter[value="1"],progressmeter[value="2"],progressmeter[value="3"],progressmeter[value="4"],progressmeter[value="5"],progressmeter[value="6"],progressmeter[value="7"],progressmeter[value="8"],progressmeter[value="9"]{background:#EEE!important}
progressmeter[value^="1"]:not([value="1"]){background:#DDD!important}
progressmeter[value^="2"]:not([value="2"]){background:#CCC!important}
progressmeter[value^="3"]:not([value="3"]){background:#BBB!important}
progressmeter[value^="4"]:not([value="4"]){background:#AAA!important}
progressmeter[value^="5"]:not([value="5"]){background:#999!important}
progressmeter[value^="6"]:not([value="6"]){background:#777!important}
progressmeter[value^="7"]:not([value="7"]){background:#555!important}
progressmeter[value^="8"]:not([value="8"]){background:#333!important}
progressmeter[value^="9"]:not([value="9"]),progressmeter[value="100"]{background:#111!important}