Examine source code of Soul Eater

{
  "name": "Soul Eater",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "souleater-3.png"
    },
    "colors": {
      "frame": "rgba(0, 35, 115, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0.38)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(0, 27, 163, 0.24)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(221, 0, 255, 0.57)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a04d3c9a-068f-40a7-a487-c782f3842d93}"
    }
  }
}