How to detect / identify PWA (web apps) windows?

Add-ons Development
1

Firefox has now web-apps support:

But I’m unable to “detect” web-app being opened.
For example:

browser.windows.onCreated.addListener(console.log);
// will print this after opening "WhatsApp" from taskbar:
{
  "id": 2830,
  "focused": false,
  "top": 236,
  "left": 513,
  "width": 1738,
  "height": 1066,
  "incognito": false,
  "type": "normal",
  "state": "normal",
  "alwaysOnTop": false,
  "title": "Firefox Developer Edition"
}

And querying Window + Tab data later on doesn’t get anything web-app specific.
Tab object:

{
  "id": 323,
  "index": 0,
  "windowId": 2716,
  "highlighted": true,
  "active": true,
  "attention": false,
  "pinned": false,
  "status": "complete",
  "hidden": false,
  "discarded": false,
  "incognito": false,
  "width": 1722,
  "height": 1023,
  "lastAccessed": 1786611813460,
  "audible": false,
  "autoDiscardable": true,
  "mutedInfo": {
    "muted": false
  },
  "isInReaderMode": false,
  "sharingState": {
    "camera": false,
    "microphone": false
  },
  "successorTabId": -1,
  "groupId": -1,
  "splitViewId": -1,
  "cookieStoreId": "firefox-default",
  "url": "https://web.whatsapp.com/",
  "title": "WhatsApp",
  "favIconUrl": "data:image/png;base64,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"
}

UPDATE:
There is actually one way to detect PWA, but it requires "<all_urls>" permission, then you can inject and execute this JS code:

window.matchMedia('(display-mode: minimal-ui)').matches

I don’t think I need to stress out how much I want to avoid "<all_urls>" :slight_smile: .