Examine source code of Open URLs in Container

{
  "manifest_version": 2,
  "name": "Open URLs in Container",
  "version": "0.1.4",
  "description": "Open any URL (not just those with a specific domain) in a multi-account container",
  "developer": {
    "name": "ergolyam",
    "url": "mailto:grisha765@tuta.io"
  },
  "default_locale": "en",
  "permissions": [
    "<all_urls>",
    "tabs",
    "contextualIdentities",
    "cookies",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background/tab-updated-listener.js"
    ]
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_action": {
    "default_title": "Open URLs in Container",
    "theme_icons": [
      {
        "light": "icon-light.svg",
        "dark": "icon-dark.svg",
        "size": 16
      },
      {
        "light": "icon-light.svg",
        "dark": "icon-dark.svg",
        "size": 32
      }
    ],
    "default_popup": "settings/settings.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4cd11f8b-8c33-472d-a725-f8bc4469328b}",
      "strict_min_version": "138.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}