style.css

@-moz-document url-prefix("https://github.com/") {
/* Header Stuff */
/* make the header smaller and less large */
.AppHeader .AppHeader-globalBar {
    padding-top: 10px;
    padding-bottom: 10px;
}

/* make the header buttons lickable */
.AppHeader .AppHeader-button {
    background-image: linear-gradient(#fcfcfc, #eee);
}


/* Button Stuff */
/* Selectors */
.subnav-item.selected,
.subnav-item[aria-selected=true],
.subnav-item[aria-current]:not([aria-current=false]) {
    z-index: 2;
    color: #fff;
    background-color: #4078c0;
    border-color: #4078c0;
}

.subnav-item:first-child {
    border-top-left-radius: 3px;
    border-bottom-left-radius: 3px;
}


.subnav-item:last-child {
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
}

.subnav-item {
    position: relative;
    float: left;
    padding: 7px 14px;
    font-weight: bold;
    color: #666;
    border: 1px solid #e5e5e5;
}

/* White Buttons */
.btn {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.hILMMl {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.pyyxt {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.dTgfec {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.fmvlPZ {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.bDhqXD {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.fruYDV {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.jrLMah {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.cQeCID {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.dWnuhe {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.jXTShb {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.Button--secondary {
    background-image: linear-gradient(#fcfcfc, #eee);
}

.bxEVaz {
    background-image: linear-gradient(#fcfcfc, #eee);
}
/* Green Buttons */
.gYvpXq {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

.hMiVVt {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

.jfVyMH {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

.Button--primary {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

.btn-primary {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

.lKDHc {
    background-color: #60b044;
    background-image: linear-gradient(#8add6d, #60b044);
    border-color: #5ca941;
}

}