Examine source code of Best Friends

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#667e2a",
      "tab_background_text": "#fefff7"
    }
  },
  "version": "2.0",
  "name": "Best  Friends",
  "manifest_version": 2,
  "description": "golden retriever puppy and tabby kitten, friends in the garden with pink flowers and green background.\n\nDesigned by MaDonna"
}