Examine source code of Container Tab Grouper

{
  "manifest_version": 2,
  "name": "Container Tab Grouper",
  "version": "1.0",
  "description": "Automatically groups tabs by their Firefox containers using the tab grouping feature",
  "permissions": [
    "tabs",
    "contextualIdentities",
    "tabGroups",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Container Tab Grouper",
    "default_icon": "icon.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "container-tab-grouper@example.com",
      "data_collection_permissions": {
        "allow_any": false,
        "allow_mozilla": false,
        "required": [
          "none"
        ]
      }
    }
  }
}