jira-priority-hack.css

@-moz-document domain("askmiso.atlassian.net") {
img[alt="Medium"],
img[alt="Priority: Medium"] {
    border-radius: 100%;
    border: 1px solid #ea7d24;
}

img[alt="High"],
img[alt="Priority: High"] {
    border: 1px solid #ea4444;
}

img[alt="Highest"],
img[alt="Priority: Highest"] {
    border: 1px solid #00cece;
    filter: invert(1);
    background: #00cece;
}

img[alt="Low"],
img[alt="Priority: Low"] {
    border: 1px dashed #2a8735;
}
}