Examine source code of DeepSeek Helper

{
  "manifest_version": 2,
  "name": "DeepSeek Helper",
  "version": "1.2",
  "description": "Add quick input for DeepSeek",
  "permissions": [
    "storage",
    "*://chat.deepseek.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://chat.deepseek.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "sidebar.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "deepseek-helper@zxkmm.com"
    }
  }
}