Examine source code of My Shortcuts

{
  "manifest_version": 2,
  "name": "Open Shortcut",
  "version": "1.1",
  "description": "A simple Firefox extension to open Shortcut.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Click to open Shortcut"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{919c8338-a3dc-4e14-83cb-7c9632925379}"
    }
  }
}