@-moz-document url-prefix("https://www.facebook.com/"), url-prefix("http://www.facebook.com/") {
.homeWiderContent div#rightCol {
display:none;
}

.hasLeftCol .homeWiderContent div#contentArea {
width:750px;
}
.hasLeftCol #rightCol {
display:none;
}
.hasLeftCol .hasRightCol #contentArea {
width:750px;
}
}