Examine source code of The Rusty Wall

{
  "theme": {
    "images": {
      "theme_frame": "rusty_wall1.jpg"
    },
    "colors": {
      "frame": "#5c474e",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "The Rusty Wall",
  "manifest_version": 2,
  "description": "This is a wall of my father-in-law's factory in Osaka, Japan that I've been looking at for years, biding my time to snap a shot. Today was the day to finally shoot it. There are so many details I could have chosen. Ready for the walls of the MOMA ;)"
}