Examine source code of IrisDay

{
  "name": "IrisDay",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "irisnow.jpg"
    },
    "colors": {
      "frame": "rgba(255, 255, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(255, 255, 255, 0.1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(245, 245, 245, 0.38)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 0.04)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a29afba2-e52d-4dd6-8bcd-8ff0b4f9b83e}"
    }
  }
}