Examine source code of Dark Mode Pro

{
  "manifest_version": 2,
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://github.com/ysard/cookie-quick-manager",
  "author": "Ysard",
  "name": "Cookie Quick Manager",
  "version": "0.5rc2",
  "default_locale": "en",
  "permissions": [
    "cookies",
    "<all_urls>",
    "activeTab",
    "storage",
    "browsingData",
    "contextualIdentities",
    "privacy"
  ],
  "optional_permissions": [
    "clipboardWrite"
  ],
  "browser_action": {
    "browser_style": true,
    "default_title": "Cookie Quick Manager",
    "default_popup": "menu.html",
    "default_icon": {
      "48": "icons/icon48.png",
      "96": "icons/icon96.png"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "background": {
    "scripts": [
      "api.js",
      "background-script.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dba0c567-7e83-406c-b093-40ac9f7cd793}"
    }
  }
}