Examine source code of VLibras Plugin

{
  "manifest_version": 2,
  "name": "VLibras",
  "version": "7.0.0",
  "description": "Um tradutor de Português para Libras",
  "homepage_url": "https://www.gov.br/governodigital/pt-br/acessibilidade-e-usuario/vlibras",
  "browser_specific_settings": {
    "gecko": {
      "id": "@vlibras-plugin",
      "strict_min_version": "78.0"
    }
  },
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "browser_action": {
    "default_title": "Abrir VLibras",
    "default_icon": {
      "16": "icons/16x16.png",
      "48": "icons/48x48.png",
      "128": "icons/128x128.png"
    }
  },
  "permissions": [
    "storage",
    "windows",
    "tabs",
    "menus",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_security_policy": "default-src 'self'; script-src 'self' 'unsafe-eval' 'wasm-unsafe-eval' blob:; connect-src *; style-src * 'unsafe-inline' 'self' blob:; img-src 'self' data:; font-src 'self' data:; object-src 'self';"
}