Examine source code of Manager Friends Request

{
  "manifest_version": 3,
  "name": "Manager Friends Request",
  "version": "0.0.4",
  "description": "Manager Friends Request on Facebook",
  "action": {
    "default_icon": "./assets/icons-128.png",
    "default_popup": "./dist/popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fabianesser7@gmail.com"
    }
  },
  "options_ui": {
    "page": "./dist/options/index.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "./dist/background/index.mjs"
    ]
  },
  "icons": {
    "16": "./assets/icons-128.png",
    "48": "./assets/icons-128.png",
    "128": "./assets/icons-128.png"
  },
  "permissions": [
    "declarativeNetRequest"
  ],
  "host_permissions": [
    "https://*.facebook.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.facebook.com/*"
      ],
      "js": [
        "./dist/contentScripts/index.global.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "dist/contentScripts/style.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}