Examine source code of Tab Exporter

{
  "manifest_version": 2,
  "name": "Tab Exporter",
  "version": "1.0",
  "description": "Export and import browser tabs with titles.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a58d5eb0-302f-43d4-817b-c40db55fd584}"
    }
  }
}