Examine source code of CASA

{
  "manifest_version": 2,
  "name": "CASA",
  "description": "CassandHRa Active Sourcing Assistant",
  "version": "1.3.3",
  "icons": {
    "19": "icons/icon19.png",
    "38": "icons/icon38.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "page_action": {
    "pinned": true,
    "default_icon": {
      "19": "icons/icon19.png",
      "38": "icons/icon38.png",
      "64": "icons/icon64.png",
      "128": "icons/icon128.png"
    },
    "default_title": "CassandHRa CASA"
  },
  "background": {
    "persistent": true,
    "scripts": [
      "lib/axios.min.js",
      "lib/browser-polyfill.min.js",
      "lib/jquery-3.1.1.min.js",
      "scripts/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.cassandhra.com/*",
        "https://localhost:8081/*",
        "https://localhost/*"
      ],
      "js": [
        "lib/browser-polyfill.min.js",
        "scripts/cass-connector.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    },
    {
      "matches": [
        "https://www.xing.com/xtm/*"
      ],
      "js": [
        "lib/browser-polyfill.min.js",
        "lib/jquery-3.1.1.min.js",
        "scripts/common_cs.js",
        "scripts/xtm_cs.js"
      ],
      "css": [
        "styles/xtm.css"
      ]
    },
    {
      "matches": [
        "https://www.linkedin.com/recruiter/profile/*"
      ],
      "js": [
        "lib/browser-polyfill.min.js",
        "lib/jquery-3.1.1.min.js",
        "scripts/li_rl_cs.js",
        "scripts/common_cs.js"
      ],
      "css": [
        "styles/li_rl.css"
      ]
    },
    {
      "matches": [
        "https://www.linkedin.com/in/*"
      ],
      "js": [
        "lib/browser-polyfill.min.js",
        "lib/jquery-3.1.1.min.js",
        "scripts/linkedin_cs.js",
        "scripts/common_cs.js"
      ],
      "css": [
        "styles/linkedin.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "scripts/xing_inject.js",
    "scripts/xtm_inject.js",
    "pages/frame.html",
    "pages/frameloader.html",
    "icons/icon64.png",
    "icons/icon128.png"
  ],
  "permissions": [
    "https://www.xing.com/*",
    "https://www.linkedin.com/*",
    "https://*.cassandhra.com/*",
    "tabs",
    "storage",
    "webRequest"
  ],
  "content_security_policy": "default-src 'self' https://localhost:8081 https://app.cassandhra.com; script-src 'self' https://localhost:8081 https://app.cassandhra.com; object-src 'self'; frame-src 'self' https://localhost:8081 https://app.cassandhra.com"
}