Examine source code of Howrah Bridge

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Howrah Bridge",
  "manifest_version": 2,
  "description": "Howrah Bridge is a cantilever bridge with a suspended span over the Hooghly River in West Bengal, India. Commissioned in 1943,  the bridge was originally named the New Howrah Bridge, because it replaced a pontoon bridge at the same location linking the two cities of Howrah and Kolkata (Calcutta)."
}