Examine source code of Mythical Phoenix

{
  "theme": {
    "images": {
      "theme_frame": "MythicalPhoenix.jpg"
    },
    "colors": {
      "frame": "#050000",
      "tab_background_text": "#080000"
    }
  },
  "version": "2.0",
  "name": "Mythical Phoenix",
  "manifest_version": 2,
  "description": "The Phoenix is a mythical bird that has long been presented as a symbol of rebirth, immortality, and renewal."
}