Examine source code of Simply Spiderman

{
  "theme": {
    "images": {
      "theme_frame": "lightweighttheme-header.jpg"
    },
    "colors": {
      "frame": "#a6a4a4",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Simply Spiderman",
  "manifest_version": 2,
  "description": "Spiderman with logos and webs.  Spidey, Spidy, Superhero, Marvel, Comic, Hero, Avengers"
}