Examine source code of Contented Cows by M♥Donna

{
  "name": "Contented Cows by M♥Donna",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Contented Cows2.jpg"
    },
    "colors": {
      "frame": "rgba(128, 204, 255, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(127, 200, 255, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(127, 200, 255, 0.08)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{93fc6210-6b44-4b7f-aa3d-e2c5ae345b70}"
    }
  }
}