Examine source code of Blue Winter Design

{
  "name": "Blue Winter Design",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(1, 28, 48, 1)",
      "tab_background_text": "rgba(201, 252, 255, 1)",
      "toolbar": "rgba(1, 29, 51, 0)",
      "bookmark_text": "rgba(201, 252, 255, 1)",
      "toolbar_field": "rgba(1, 29, 51, 0.08)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b3a3ed65-add6-4003-a8b1-0c6c4c843e8a}"
    }
  }
}