Examine source code of email-check-extension

{
  "name": "email-check-extension",
  "version": "1.0.7",
  "description": "邮件内容安全检测插件,目前适配浏览器:Edge浏览器,Chrome浏览器,FireFox浏览器,适配邮箱:163邮箱,126邮箱,yeah邮箱,通过此扩展可以在以上邮箱收到邮件时提示用户邮件中链接是否安全",
  "homepage_url": "https://cryptom.antiy.cn:31743/tutorial/faq.html",
  "manifest_version": 2,
  "minimum_chrome_version": "70.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "iep@antiy.com",
      "strict_min_version": "79.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.bundle.js"
    ]
  },
  "browser_action": {
    "browser_style": false,
    "default_icon": {
      "16": "img/icon16.png",
      "24": "img/icon16.png",
      "32": "img/icon32.png",
      "48": "img/icon48.png"
    },
    "default_title": "email-check-extension"
  },
  "privacy_policy": "https://addons.mozilla.org/en-US/firefox/addon/email-check-extension/privacy/",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "64": "img/icon64.png",
    "128": "img/icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "nativeMessaging"
  ],
  "host_permissions": [
    "https://mail.163.com/*",
    "https://mail.126.com/*",
    "https://wx.mail.qq.com/*",
    "https://mail.antiy.cn/*",
    "https://mail.yeah.net/*",
    "https://qiye.aliyun.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://mail.163.com/*",
        "https://mail.126.com/*",
        "https://wx.mail.qq.com/*",
        "https://mail.antiy.cn/*",
        "https://mail.yeah.net/*",
        "https://qiye.aliyun.com/*"
      ],
      "js": [
        "content-scripts/cs-mailvelope.js"
      ],
      "run_at": "document_end"
    }
  ]
}