Examine source code of External Links Container

{
  "manifest_version": 2,
  "name": "External Links Container",
  "version": "1.0.0",
  "description": "Open External Links to a separated Container",
  "developer": {
    "name": "Tareq Ahamed",
    "url": "https://github.com/tareqas"
  },
  "permissions": [
    "<all_urls>",
    "cookies",
    "tabs",
    "contextualIdentities",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "16": "images/16x16.png",
    "32": "images/32x32.png",
    "48": "images/48x48.png",
    "96": "images/96x96.png",
    "128": "images/128x128.png"
  }
}