Examine source code of Corn Harvest

{
  "name": "Corn Harvest",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "cornharvestH.jpg"
    },
    "colors": {
      "frame": "rgba(255, 233, 153, 1)",
      "tab_background_text": "#000000",
      "toolbar": "rgba(255, 236, 153, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(255, 236, 153, 0.08)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e1110b45-1585-44d5-a4e4-3e4cf5e96147}"
    }
  }
}