Examine source code of FamilyCard

{
  "manifest_version": 2,
  "name": "FamilyCard",
  "description": "Familycard extension",
  "author": "Oleg Tolkach",
  "version": "1.7.2",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "oleg.tolkach@gmail.com",
      "strict_min_version": "45.0"
    }
  },
  "browser_action": {
    "default_icon": "icons/30.png",
    "default_popup": "html/popup.html"
  },
  "icons": {
    "16": "icons/16.png",
    "19": "icons/19.png",
    "30": "icons/30.png",
    "32": "icons/32.png",
    "38": "icons/38.png",
    "64": "icons/64.png",
    "128": "icons/128.png",
    "256": "icons/256.png"
  },
  "background": {
    "scripts": [
      "js/vendor/jquery.min.js",
      "js/vendor/moment.min.js",
      "js/vendor/base64.min.js",
      "js/vendor/psl.min.js",
      "js/vendor/lodash.min.js",
      "js/const.js",
      "js/apis/FCApi.js",
      "js/apis/ECIMApi.js",
      "js/helpers.js",
      "js/background.js"
    ]
  },
  "content_scripts": [
    {
      "css": [
        "css/style.min.css",
        "css/select2.min.css"
      ],
      "matches": [
        "*://*/*"
      ],
      "js": [
        "js/vendor/jquery.min.js",
        "js/vendor/moment.min.js",
        "js/vendor/base64.min.js",
        "js/vendor/psl.min.js",
        "js/vendor/lodash.min.js",
        "js/vendor/select2.min.js",
        "js/const.js",
        "js/apis/FCApi.js",
        "js/apis/ECIMApi.js",
        "js/helpers.js",
        "js/services/FCService.js",
        "js/services/ECIMService.js",
        "js/bars/FCBar.js",
        "js/bars/ECIMBar.js",
        "js/content.js"
      ]
    },
    {
      "js": [
        "js/integrations/google.js"
      ],
      "matches": [
        "https://www.google.com/*",
        "https://google.com/*",
        "https://www.google.be/*",
        "https://google.be/*"
      ]
    },
    {
      "js": [
        "js/integrations/familycard.js"
      ],
      "matches": [
        "https://www.familycard.be/*",
        "https://familycard.be/*"
      ]
    },
    {
      "js": [
        "js/integrations/ecim.js"
      ],
      "matches": [
        "https://www.everyclickismagic.be/*",
        "https://everyclickismagic.be/*"
      ]
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "permissions": [
    "webRequest",
    "management",
    "storage",
    "https://www.familycard.be/",
    "https://*.facebook.com/*",
    "https://4pmedia.rurl.me/*",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "html/*",
    "img/*"
  ]
}