Examine source code of URL MultiShortener

{
  "manifest_version": 2,
  "name": "__MSG_messageName__",
  "version": "2.12.0",
  "description": "__MSG_messageDescription__",
  "default_locale": "en",
  "homepage_url": "https://shorteners.net/",
  "icons": {
    "16": "data/icon-16-borde.png",
    "48": "data/icon-48.png",
    "64": "data/icon-borde.png",
    "96": "data/icon-96.png",
    "128": "data/icon-128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "http://*/*",
    "https://*/*",
    "storage",
    "clipboardWrite",
    "notifications",
    "contextMenus"
  ],
  "browser_action": {
    "default_title": "URL MultiShortener - Alt+U",
    "default_icon": "data/icon-borde.png",
    "default_popup": "popup/short.html"
  },
  "background": {
    "scripts": [
      "background/make-call.js",
      "background/install.js",
      "background/apis.js",
      "background/apis-procesar.js",
      "background/ums.js"
    ]
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Alt+U",
        "mac": "Alt+U",
        "linux": "Alt+U"
      },
      "description": "Open URL MultiShortener"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": true
  },
  "web_accessible_resources": [
    "content/*",
    "popup/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "@url-multishortener"
    }
  }
}