Examine source code of hackerone2txt

{
  "description": " Auto exporting in-scope domains to a TXT file from hackerone.com Demo: https://gfycat.com/DelectableEagerCat ",
  "manifest_version": 2,
  "name": "hackerone2txt",
  "version": "1.3resigned1",
  "icons": {
    "128": "static_shit/actionbar-logo/logo128.png"
  },
  "page_action": {
    "browser_style": true,
    "default_icon": {
      "128": "static_shit/actionbar-logo/logo128.png"
    },
    "default_title": "hackerone2txt?",
    "show_matches": [
      "*://*.hackerone.com/*"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.hackerone.com/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "downloads"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{61c51713-e458-4ab0-b388-9dff68532724}"
    }
  }
}