Examine source code of ReplyFrog

{
  "manifest_version": 3,
  "name": "ReplyFrog",
  "description": "ReplyFrog — AI-assisted reply drafts for X/Twitter and LinkedIn. Human-in-the-loop, never auto-posts.",
  "version": "1.6.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://x.com/*",
    "https://twitter.com/*",
    "https://api.x.com/*",
    "https://api.twitter.com/*",
    "https://www.linkedin.com/*",
    "https://linkedin.com/*",
    "https://api.replyfrog.com/*",
    "https://replyfrog.com/*",
    "https://replyfrog.test/*",
    "http://localhost:3000/*"
  ],
  "optional_host_permissions": [
    "https://www.instagram.com/*",
    "https://instagram.com/*",
    "https://www.facebook.com/*",
    "https://facebook.com/*",
    "https://www.threads.net/*",
    "https://threads.net/*",
    "https://www.reddit.com/*",
    "https://reddit.com/*",
    "https://www.quora.com/*",
    "https://quora.com/*"
  ],
  "action": {
    "default_title": "ReplyFrog Settings"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "icons/*"
      ],
      "matches": [
        "https://x.com/*",
        "https://twitter.com/*",
        "https://www.linkedin.com/*",
        "https://linkedin.com/*"
      ]
    },
    {
      "resources": [
        "content-scripts/settings-flyout.css"
      ],
      "use_dynamic_url": true,
      "matches": [
        "https://linkedin.com/*",
        "https://twitter.com/*",
        "https://www.linkedin.com/*",
        "https://x.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "replyfrog@replyfrog.com",
      "strict_min_version": "110.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://linkedin.com/*",
        "https://www.linkedin.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/linkedin-injector.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "https://linkedin.com/*",
        "https://www.linkedin.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/linkedin.js"
      ]
    },
    {
      "matches": [
        "https://linkedin.com/*",
        "https://twitter.com/*",
        "https://www.linkedin.com/*",
        "https://x.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/settings-flyout.js"
      ]
    },
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/x-injector.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/x.js"
      ]
    }
  ]
}