Examine source code of Novel Updates Notifier

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "short_name": "NU Notifier",
  "version": "1.5.0",
  "author": "Spark-NF",
  "developer": {
    "name": "Spark-NF",
    "url": "https://github.com/Spark-NF"
  },
  "description": "__MSG_extensionDescription__",
  "homepage_url": "https://github.com/Spark-NF/novel-updates-notifier",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'; connect-src https://www.novelupdates.com",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "id": "novel-updates-notifier-firefox@nicolas-faure.fr",
      "strict_min_version": "55.0"
    }
  },
  "background": {
    "page": "src/background/background.html",
    "persistent": true
  },
  "permissions": [
    "storage",
    "cookies",
    "notifications",
    "*://www.novelupdates.com/*",
    "webNavigation",
    "*://www.webnovel.com/*",
    "*://m.webnovel.com/*",
    "*://www.wuxiaworld.com/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/action-16.png",
      "32": "icons/action-32.png",
      "64": "icons/action-64.png"
    },
    "theme_icons": [
      {
        "light": "icons/action-16-light.png",
        "dark": "icons/action-16.png",
        "size": 16
      },
      {
        "light": "icons/action-32-light.png",
        "dark": "icons/action-32.png",
        "size": 32
      },
      {
        "light": "icons/action-64-light.png",
        "dark": "icons/action-64.png",
        "size": 64
      }
    ],
    "default_title": "Novel Updates",
    "default_popup": "src/popup/popup.html"
  },
  "sidebar_action": {
    "default_icon": {
      "16": "icons/action-16.png",
      "32": "icons/action-32.png",
      "64": "icons/action-64.png"
    },
    "default_title": "Novel Updates",
    "default_panel": "src/sidebar/sidebar.html",
    "open_at_install": false
  },
  "options_ui": {
    "page": "src/options/options.html"
  },
  "web_accessible_resources": [
    "src/userstyles/css/*.css"
  ]
}