Examine source code of AWS Apps Container

{
  "manifest_version": 2,
  "name": "AWS Apps Container",
  "version": "1.7.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{2258e9fe-f0b6-4f2d-a719-510d1ef0a65f}"
    }
  },
  "homepage_url": "https://github.com/dangh/firefox-aws-apps-container",
  "permissions": [
    "tabs",
    "contextualIdentities",
    "cookies",
    "webRequest",
    "webRequestBlocking",
    "https://*.awsapps.com/*",
    "https://*.amazonaws.com/*",
    "https://*.console.aws.amazon.com/*",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://*.awsapps.com/start*"
      ],
      "js": [
        "content.js"
      ]
    }
  ]
}