Examine source code of AtlanticaMN

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#596189",
      "tab_background_text": "#596189"
    }
  },
  "version": "2.0",
  "name": "AtlanticaMN",
  "manifest_version": 2,
  "description": "Support the band, Atlantica, by adding their Firefox persona to your browser!"
}