Examine source code of Nest

{
  "manifest_version": 3,
  "name": "Better Twitter",
  "version": "1.0",
  "description": "The better version of Twitter/X, blocking all paid promos, and more!",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://twitter.com/*",
    "https://x.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "better-twitter@yourdomain.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.twitter.com/*",
        "https://*.x.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*.png",
        "images/*.jpg",
        "images/*.gif"
      ],
      "matches": [
        "https://*.twitter.com/*",
        "https://*.x.com/*"
      ]
    }
  ],
  "icons": {
    "48": "images/favicon.png",
    "128": "images/favicon.png"
  },
  "action": {
    "default_popup": "options.html",
    "default_icon": "images/favicon.png"
  },
  "options_page": "options.html"
}