Examine source code of NBtab New Tab

{
  "manifest_version": 3,
  "default_locale": "zh_CN",
  "name": "__MSG_extensionName__",
  "version": "2.0.0",
  "description": "__MSG_extensionDescription__",
  "icons": {
    "16": "icons/16.png",
    "24": "icons/24.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "128": "icons/128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/16.png",
      "24": "icons/24.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "64": "icons/64.png",
      "128": "icons/128.png"
    },
    "default_title": "快速收藏到NBtab",
    "default_popup": "popup.html"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "host_permissions": [
    "https://api.nbtab.com/*",
    "https://v1.jinrishici.com/*",
    "https://www.baidu.com/*"
  ],
  "permissions": [
    "activeTab",
    "search"
  ],
  "optional_permissions": [
    "history",
    "bookmarks",
    "favicon"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yunying@nbtab.com",
      "strict_min_version": "109.0"
    }
  }
}