Examine source code of FoxClocks

{
  "manifest_version": 3,
  "name": "__MSG_extension_name__",
  "description": "__MSG_extension_description__",
  "author": "Andy McDonald",
  "homepage_url": "https://foxclocks.org",
  "default_locale": "en",
  "version": "7.0.2",
  "background": {
    "scripts": [
      "/lib/utils.js",
      "/lib/background.js"
    ]
  },
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space",
        "mac": "Command+Shift+Space"
      }
    }
  },
  "options_ui": {
    "page": "/html/options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{d37dc5d0-431d-44e5-8c91-49419370caa1}",
      "strict_min_version": "109.0"
    }
  },
  "action": {
    "default_icon": {
      "19": "/images/icon19.png",
      "38": "/images/icon38.png"
    },
    "default_title": "__MSG_extension_name__",
    "default_popup": "/html/popup.html"
  },
  "icons": {
    "16": "/images/icon16.png",
    "32": "/images/icon32.png",
    "48": "/images/icon48.png",
    "96": "/images/icon96.png",
    "128": "/images/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": true,
      "css": [
        "/css/content.css"
      ],
      "js": [
        "/3rdparty/jquery.min.js",
        "/3rdparty/moment-with-locales.min.js",
        "/lib/utils.js",
        "/lib/info.js",
        "/lib/content.js"
      ],
      "all_frames": false,
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage",
    "notifications",
    "tabs",
    "alarms"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "/html/statusbar.html",
        "/css/statusbar.css",
        "/images/bullet_toggle_minus.png",
        "/images/flags/*.png"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ]
}