Examine source code of Lemon New Tab

{
  "manifest_version": 2,
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "version": "3.2.3",
  "icons": {
    "16": "/icon-16.png",
    "24": "/icon-24.png",
    "32": "/icon-32.png",
    "48": "/icon-48.png",
    "64": "/icon-64.png",
    "96": "/icon-96.png",
    "128": "/icon-128.png",
    "256": "/icon-256.png",
    "512": "/icon-512.png"
  },
  "author": "Red_lnn<lemon@redlnn.top>",
  "default_locale": "en",
  "content_security_policy": "script-src 'self'; object-src 'none'; img-src 'self' https: http: data: blob:",
  "permissions": [
    "topSites",
    "storage",
    "alarms",
    "bookmarks",
    "activeTab",
    "tabs",
    "https://www.bing.com/",
    "https://api.bing.com/",
    "https://suggestion.baidu.com/",
    "https://suggestqueries.google.com/",
    "https://v2.jinrishici.com/",
    "https://v1.hitokoto.cn/",
    "https://favicon.so/",
    "https://favicon.im/"
  ],
  "optional_permissions": [
    "*://*/*"
  ],
  "chrome_settings_overrides": {
    "homepage": "newtab.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{25566b3f-eaeb-4f05-aac6-da1efc2dc1fd}",
      "data_collection_permissions": {
        "required": [
          "bookmarksInfo",
          "browsingActivity"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "browser_action": {
    "default_popup": "popup.html"
  }
}