manifest.json

{
    "name": "OpenPGP Email Lookup",
    "description": "Check if there is a PGP key in the OpenPGP keyserver associated with the mailto: links on the current page. The lookup is done on click of the extension icon or by pressing Ctrl+Shift+Z (Command+Shift+Z on Mac).",
    "version": "0.0.9",
    "manifest_version": 3,
    "author": "Joep de Jong",
    "action": {
      "default_title": "Retrieve PGP keys"
    },
    "icons": {
      "64": "img/icon-64.png"
    },
    "incognito": "split",
    "permissions": [
        "activeTab", 
        "scripting",
        "notifications",
        "nativeMessaging"
    ],
    "background": {
      "service_worker": "background.js"
    },
    "commands": {
        "_execute_action": {
            "suggested_key": {
            "windows": "Ctrl+Shift+Z",
            "mac": "Command+Shift+Z",
            "chromeos": "Ctrl+Shift+Z",
            "linux": "Ctrl+Shift+Z"
            }
        }
    }
  }