Examine source code of X Post Text Enhancer

{
  "action": {
    "default_icon": {
      "16": "icons/icon128.png",
      "48": "icons/icon128.png",
      "128": "icons/icon128.png",
      "300": "icons/icon300.png",
      "1024": "icons/icon1024.png"
    },
    "default_popup": "index.html",
    "default_title": "X Post Text Enhancer"
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "*://*.twitter.com/*",
        "*://twitter.com/*",
        "*://*.x.com/*",
        "*://x.com/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self';"
  },
  "description": "Customizes font size & family and line height for X posts. Aids readability for low vision. No data collected.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "manifest_version": 3,
  "name": "X Post Text Enhancer",
  "permissions": [
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "*://*.twitter.com/*",
    "*://twitter.com/*",
    "*://*.x.com/*",
    "*://x.com/*"
  ],
  "version": "1.7.1",
  "web_accessible_resources": [
    {
      "resources": [
        "fonts-files/MehrUrdu.ttf",
        "toolbar.css"
      ],
      "matches": [
        "*://*.twitter.com/*",
        "*://twitter.com/*",
        "*://*.x.com/*",
        "*://x.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "x-post-text-enhancer@yourdomain.com"
    }
  }
}