Examine source code of Link Shortener

{
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{7aa87a02-77e4-44b0-8dc1-acd8f76703c2}"
    }
  },
  "homepage_url": "https://t.ly/products/link-shortener-extension/",
  "version": "2.1.98",
  "icons": {
    "16": "media/icons/icon16.png",
    "48": "media/icons/icon48.png",
    "128": "media/icons/icon128.png"
  },
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "options_page": "options.html",
  "action": {
    "default_icon": {
      "38": "media/icons/icon38.png"
    },
    "default_title": "__MSG_appName__",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "js/helpers.js",
      "js/storage.js",
      "js/background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "clipboardWrite",
    "scripting"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+L",
        "mac": "Command+Shift+L"
      }
    }
  }
}