Examine source code of Container Switcher

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "short_name": "Containers",
  "version": "0.5.0",
  "description": "__MSG_extDesc__",
  "default_locale": "zh_CN",
  "browser_specific_settings": {
    "gecko": {
      "id": "container-switcher@local",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "contextualIdentities",
    "cookies",
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "lib/storage.js",
      "lib/matcher.js",
      "background/containers.js",
      "background/background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "action": {
    "default_title": "__MSG_extName__",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "48": "icons/icon-48.svg",
      "96": "icons/icon-96.svg"
    }
  },
  "icons": {
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg"
  }
}