Examine source code of Drive File List Printer

{
  "action": {
    "default_icon": {
      "19": "icon19.png",
      "38": "icon38.png"
    },
    "default_popup": "menu.html",
    "default_title": "Drive File List"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Drive File List creator",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "DriveFileListPrinter@TheBlackbird"
    }
  },
  "manifest_version": 3,
  "name": "Drive File List Printer",
  "offline_enabled": true,
  "permissions": [
    "activeTab",
    "scripting",
    "contextMenus"
  ],
  "short_name": "DriveFileLst",
  "version": "1.4.2.0"
}