Firefox CSD to the left side (Breeze)

userChrome.css

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#titlebar-max { -moz-box-ordinal-group: 1; }
#titlebar-content { direction: rtl; }
#TabsToolbar { direction: rtl; }
#tabbrowser-tabs { direction: ltr; }

.titlebar-placeholder { direction: ltr !important; }

#titlebar-close, #titlebar-max, #titlebar-min { margin-top: -4px !important; }

:root[sizemode="maximized"] #titlebar-close {
  opacity: 0 !important;
  z-index: -1 !important;
  margin-top: -48px !important;
}
:root[sizemode="maximized"] #titlebar-max {
  opacity: 0 !important;
  z-index: -1 !important;
  margin-top: -48px !important;
}
:root[sizemode="maximized"] #titlebar-min {
  opacity: 0 !important;
  z-index: -1 !important;
  margin-top: -48px !important;
}
:root[sizemode="maximized"] #TabsToolbar {
  margin-left: -118px;
  z-index: 99 !important;
}