Examine source code of lefred's GroupKeep

{
  "manifest_version": 3,
  "name": "lefred's GroupKeep",
  "version": "0.1.2",
  "description": "Save, restore, search, export, and sync Firefox tab groups across desktop devices.",
  "permissions": [
    "tabs",
    "tabGroups",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "lefred's GroupKeep",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "groupkeep@lefred.be",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}