Examine source code of Echo720

{
  "manifest_version": 2,
  "name": "Echo720",
  "short_name": "Echo720",
  "version": "0.0.1",
  "default_locale": "en",
  "description": "__MSG_extensionDescription__",
  "developer": {
    "name": "Jannis Pinter"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "echo360.js",
        "hls.min.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ]
}