Examine source code of Morning Blue

{
  "name": "Morning Blue",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "MorningBlueCHalkH.jpg"
    },
    "colors": {
      "frame": "rgba(188, 210, 247, 1)",
      "tab_background_text": "#2f2323",
      "toolbar": "rgba(210, 224, 250, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(210, 223, 245, 0.09)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a8ca7efa-367f-4b38-aa94-e632cd12a4a6}"
    }
  }
}