Examine source code of All_my_dogs

{
  "theme": {
    "images": {
      "theme_frame": "my_dogs_header.jpg"
    },
    "colors": {
      "frame": "#1f709c",
      "tab_background_text": "#0b4005"
    }
  },
  "version": "2.0",
  "name": "All_my_dogs",
  "manifest_version": 2,
  "description": "This shows all dogs I have had rsp. I'm still having. There names are (from left to right): Gini and Max, Max, Flocky, Anka, Marie, Gini and Gismo"
}