Examine source code of Velvet hug

{
  "name": "Velvet hug",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "temp27.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(224, 224, 224, 1)",
      "toolbar": "rgba(112, 4, 58, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(112, 4, 55, 0)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(120, 6, 143, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{446bb947-c2e6-4c40-89d9-086c882b31bd}"
    }
  }
}