Examine source code of Vintrack Browser Sync

{
  "manifest_version": 3,
  "name": "Vintrack Browser Sync",
  "version": "0.2",
  "description": "Vintrack companion for linked sessions, monitors, feeds, and Price Watches.",
  "permissions": [
    "alarms",
    "cookies",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://vintrack.jakobaio.dev/*",
    "https://*.vinted.at/*",
    "https://*.vinted.be/*",
    "https://*.vinted.co.uk/*",
    "https://*.vinted.com/*",
    "https://*.vinted.cz/*",
    "https://*.vinted.de/*",
    "https://*.vinted.dk/*",
    "https://*.vinted.es/*",
    "https://*.vinted.fi/*",
    "https://*.vinted.fr/*",
    "https://*.vinted.hr/*",
    "https://*.vinted.hu/*",
    "https://*.vinted.ie/*",
    "https://*.vinted.it/*",
    "https://*.vinted.lt/*",
    "https://*.vinted.lu/*",
    "https://*.vinted.nl/*",
    "https://*.vinted.pl/*",
    "https://*.vinted.pt/*",
    "https://*.vinted.ro/*",
    "https://*.vinted.se/*",
    "https://*.vinted.sk/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "vintrack-browser-sync@jakobaio.dev",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo",
          "browsingActivity",
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/vintrack-16.png",
    "32": "icons/vintrack-32.png",
    "48": "icons/vintrack-48.png",
    "128": "icons/vintrack-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://vintrack.jakobaio.dev/*",
        "https://*.vinted.at/*",
        "https://*.vinted.be/*",
        "https://*.vinted.co.uk/*",
        "https://*.vinted.com/*",
        "https://*.vinted.cz/*",
        "https://*.vinted.de/*",
        "https://*.vinted.dk/*",
        "https://*.vinted.es/*",
        "https://*.vinted.fi/*",
        "https://*.vinted.fr/*",
        "https://*.vinted.hr/*",
        "https://*.vinted.hu/*",
        "https://*.vinted.ie/*",
        "https://*.vinted.it/*",
        "https://*.vinted.lt/*",
        "https://*.vinted.lu/*",
        "https://*.vinted.nl/*",
        "https://*.vinted.pl/*",
        "https://*.vinted.pt/*",
        "https://*.vinted.ro/*",
        "https://*.vinted.se/*",
        "https://*.vinted.sk/*"
      ],
      "js": [
        "companion.js",
        "content-script.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "page-bridge.js",
        "companion.css"
      ],
      "matches": [
        "https://*.vinted.at/*",
        "https://*.vinted.be/*",
        "https://*.vinted.co.uk/*",
        "https://*.vinted.com/*",
        "https://*.vinted.cz/*",
        "https://*.vinted.de/*",
        "https://*.vinted.dk/*",
        "https://*.vinted.es/*",
        "https://*.vinted.fi/*",
        "https://*.vinted.fr/*",
        "https://*.vinted.hr/*",
        "https://*.vinted.hu/*",
        "https://*.vinted.ie/*",
        "https://*.vinted.it/*",
        "https://*.vinted.lt/*",
        "https://*.vinted.lu/*",
        "https://*.vinted.nl/*",
        "https://*.vinted.pl/*",
        "https://*.vinted.pt/*",
        "https://*.vinted.ro/*",
        "https://*.vinted.se/*",
        "https://*.vinted.sk/*"
      ]
    }
  ],
  "action": {
    "default_title": "Vintrack Browser Sync",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/vintrack-16.png",
      "32": "icons/vintrack-32.png",
      "48": "icons/vintrack-48.png",
      "128": "icons/vintrack-128.png"
    }
  }
}