Examine source code of Container Sentry

{
  "manifest_version": 2,
  "name": "Container Sentry",
  "version": "1.0.7",
  "description": "Open urls in a container by default, with exceptions for specific sites. It also allows adding regexes to match urls with containers.",
  "developer": {
    "name": "abg1979",
    "url": "https://github.com/abg1979/container-sentry"
  },
  "default_locale": "en",
  "icons": {
    "48": "icon.svg"
  },
  "permissions": [
    "tabs",
    "contextualIdentities",
    "cookies",
    "storage",
    "<all_urls>",
    "management",
    "webRequestBlocking",
    "webRequest"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "web_accessible_resources": [
    "/togo/*"
  ],
  "options_ui": {
    "page": "settings/settings.html"
  },
  "incognito": "not_allowed",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4a6b7acc-552a-44dc-bf26-bf7f563a1633}",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}