Examine source code of Reddit post notifier

{
  "manifest_version": 3,
  "default_locale": "en",
  "description": "__MSG_description__",
  "name": "__MSG_name__",
  "version": "7.1.0",
  "homepage_url": "https://github.com/flytaly/reddit-post-notifier",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "113.0",
      "id": "reddit-post-notifier@flytaly"
    }
  },
  "background": {
    "scripts": [
      "./dist/background.js"
    ]
  },
  "permissions": [
    "identity",
    "storage",
    "alarms",
    "notifications",
    "unlimitedStorage"
  ],
  "icons": {
    "48": "images/icon-48.png",
    "96": "images/icon-96.png",
    "128": "images/icon-128_chrome.png"
  },
  "host_permissions": [
    "https://*.reddit.com/*"
  ],
  "action": {
    "default_title": "__MSG_extension_title__",
    "default_popup": "dist/popup/index.html",
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "64": "images/icon-64.png"
    },
    "theme_icons": [
      {
        "dark": "images/icon-16.png",
        "light": "images/icon-16-light.png",
        "size": 16
      },
      {
        "dark": "images/icon-32.png",
        "light": "images/icon-32-light.png",
        "size": 32
      },
      {
        "dark": "images/icon-64.png",
        "light": "images/icon-64-light.png",
        "size": 64
      }
    ]
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+Shift+S"
      }
    }
  },
  "options_ui": {
    "page": "dist/options/watch.html",
    "open_in_tab": true
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}