@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);

#back-button {
  list-style-image: /*1*/ url(data:image/x-png;base64,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) !important;
  -moz-image-region: rect(0px 65px 0px 65px) !important;
}
#back-button:not([disabled="true"]):hover {
  list-style-image: /*3*/ url(data:image/x-png;base64,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) !important;
  -moz-image-region: rect(0px 65px 0px 65px) !important;
}
#back-button[disabled="true"] {
  list-style-image: /*2*/ url(data:image/x-png;base64,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) !important;
  -moz-image-region: rect(0px 65px 0px 65px) !important;
}
#back-button:not([disabled="true"]):hover:active {
  list-style-image: /*4*/ url(data:image/x-png;base64,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) !important;
  -moz-image-region: rect(0px 65px 0px 65px) !important;
}