Examine source code of Google Maps Wallpaper

{
  "manifest_version": 2,
  "name": "mapsWallpaper",
  "version": "1.1",
  "description": "Removes Google Street View trash to make a wallpaper.",
  "icons": {
    "32": "icons/land-32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "index.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/land-16.png",
      "32": "icons/land-32.png"
    },
    "default_title": "mapsWallpaperMaker",
    "theme_icons": [
      {
        "light": "icons/land-16.png",
        "dark": "icons/land-16.png",
        "size": 16
      },
      {
        "light": "icons/land-32.png",
        "dark": "icons/land-32.png",
        "size": 32
      }
    ]
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "tabs",
    "*://www.google.pl/maps/*"
  ]
}