Examine source code of Popola and Devola

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Popola and Devola",
  "manifest_version": 2,
  "description": "Theme of Popola and Devola.\n\nImage art from <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/a1df5597f49c436a58e81299832409d3dbdd35edfb9cd503c761807232ef57d0/https%3A//kanekiru.deviantart.com/art/Sisters-of-Fate-692293901\">https://kanekiru.deviantart.com/art/Sisters-of-Fate-692293901</a>"
}