Examine source code of Parent Path

{
  "manifest_version": 2,
  "name": "Parent Path",
  "version": "0.4",
  "description": "Adds an icon to the address bar to navigate to the parent path.",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "59.0",
      "id": "{f18ce610-c18b-4c74-8ebc-b2f65caa600a}"
    }
  },
  "icons": {
    "48": "icon.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "page_action": {
    "browser_style": true,
    "default_icon": "action.svg",
    "default_popup": "popup.html",
    "show_matches": [
      "<all_urls>"
    ]
  },
  "commands": {
    "_execute_page_action": {}
  }
}