Examine source code of Container Tabs Manager

{
  "manifest_version": 2,
  "name": "Container Tabs Manager",
  "version": "1.0",
  "description": "Close and restore tabs into your containers",
  "homepage_url": "https://github.com/Fitz3012/container-tabs-manager/tree/main",
  "icons": {
    "48": "icons/main.svg"
  },
  "permissions": [
    "<all_urls>",
    "cookies",
    "contextualIdentities",
    "management",
    "storage",
    "unlimitedStorage",
    "tabs"
  ],
  "browser_action": {
    "default_icon": "icons/main.svg",
    "default_title": "Container Tabs Manager",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{12b7b674-407d-4777-bc77-0085b1a0f6cb}"
    }
  }
}