Examine source code of Davemag2

{
  "theme": {
    "images": {
      "theme_frame": "applecross2.jpg"
    },
    "colors": {
      "frame": "#c41919",
      "tab_background_text": "#ed1111"
    }
  },
  "version": "2.0",
  "name": "Davemag2",
  "manifest_version": 2,
  "description": "Applecross - Scotland"
}