Examine source code of TabGroup Sync

{
  "manifest_version": 2,
  "author": "bluelovers",
  "homepage_url": "https://github.com/bluelovers/firefox-tabgroup-sync",
  "name": "TabGroup Sync",
  "version": "1.0.1",
  "description": "跨裝置同步 TabGroup",
  "permissions": [
    "tabs",
    "tabGroups",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "codelovers@gmail.com",
      "data_collection_permissions": {
        "collects_data": false,
        "required": [
          "none"
        ],
        "description": "This extension only stores TabGroup information in Firefox Sync. No other data is collected."
      }
    }
  },
  "data_collection_permissions": {
    "collects_data": false,
    "required": [
      "none"
    ],
    "description": "This extension only stores TabGroup information in Firefox Sync. No other data is collected."
  }
}