Examine source code of Dango Nekos

{
  "name": "Dango Nekos",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Dango Nekos.png"
    },
    "colors": {
      "frame": "rgba(252, 231, 240, 1)",
      "tab_background_text": "rgba(108, 156, 45, 1)",
      "toolbar": "rgba(255, 255, 255, 0.67)",
      "bookmark_text": "rgba(108, 156, 45, 1)",
      "toolbar_field": "rgba(255, 235, 243, 0)",
      "toolbar_field_text": "rgba(224, 56, 112, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e3c11e0-52a0-4bc6-b854-e354b4f54c2b}"
    }
  }
}