Examine source code of TabBurrow

{
  "manifest_version": 3,
  "name": "TabBurrow",
  "version": "1.3.1",
  "description": "タブを保存して管理する拡張機能",
  "browser_specific_settings": {
    "gecko": {
      "id": "tabburrow@taremin.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "tabGroups",
    "storage",
    "contextMenus",
    "alarms",
    "scripting"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "タブを保存"
  },
  "background": {
    "scripts": [
      "background/index.js"
    ],
    "type": "module"
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_page": "options.html"
}