Examine source code of Flow Like a Rainbow River

{
  "name": "Flow Like a Rainbow River",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Flow Like a Rainbow River.jpg"
    },
    "colors": {
      "frame": "rgba(100, 123, 176, 1)",
      "tab_background_text": "rgba(101, 207, 240, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cdb97448-8ebc-4e1c-bce1-728679a69147}"
    }
  }
}