Examine source code of Yk CardSafe Extension

{
  "manifest_version": 2,
  "name": "Yk CardSafe Extension",
  "version": "1.5.2",
  "description": "易快卡务安全扩展",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "nativeMessaging",
    "https://lkb.ykcard.cn/*",
    "https://*.lkb.ykcard.cn/*",
    "http://lkb.ykcard.cn/*",
    "http://*.lkb.ykcard.cn/*",
    "http://localhost/*",
    "http://127.0.0.1/*",
    "https://xyf.ynshubangkj.com/*",
    "https://*.xyf.ynshubangkj.com/*",
    "http://xyf.ynshubangkj.com/*",
    "http://*.xyf.ynshubangkj.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "web_accessible_resources": [
    "icon-128.png"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://lkb.ykcard.cn/*",
        "https://*.lkb.ykcard.cn/*",
        "http://lkb.ykcard.cn/*",
        "http://*.lkb.ykcard.cn/*",
        "http://localhost/*",
        "http://127.0.0.1/*",
        "https://xyf.ynshubangkj.com/*",
        "https://*.xyf.ynshubangkj.com/*",
        "http://xyf.ynshubangkj.com/*",
        "http://*.xyf.ynshubangkj.com/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "cardsafe@ykcard.cn",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}