Examine source code of Snows Blue Border

{
  "name": "Snows Blue Border",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "SnowsBlueBorderH.jpg"
    },
    "colors": {
      "frame": "rgba(50, 53, 117, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(50, 52, 117, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(52, 53, 120, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{80034df2-1569-45b8-8d0a-f0b38ed07e66}"
    }
  }
}