Examine source code of Montreal skyline

{
  "theme": {
    "images": {
      "theme_frame": "montrealskyline.jpeg"
    },
    "colors": {
      "frame": "#8a7f7f",
      "tab_background_text": "#f51616"
    }
  },
  "version": "2.0",
  "name": "Montreal skyline",
  "manifest_version": 2,
  "description": "photo of Montreal taken from the old expo site near the Victoria Bridge"
}