---
title: "Tooltester – Chrome extensions from this developer"
description: "3 Chrome extensions from the publisher account of Tooltester, with 1,136 users in all."
url: "https://extensiontracker.com/developer/u43578471b072a418d7368f1d9facebe2"
---

# Tooltester

- Extensions: 3
- Users in all: 1,136
- First published: 2026-03-23
- Publisher account: `u43578471b072a418d7368f1d9facebe2`

Extensions are grouped by the store's own publisher account ID, so a developer who uses several accounts appears on several pages. Live extensions come first, most users first.

| Extension | Category | Users | Rating | Updated | Status |
| --- | --- | ---: | ---: | --- | --- |
| [Email Detective for Gmail: Identify ESPs & Check Authentication](https://extensiontracker.com/extension/jmflpchhakbogamlbfmlkglnpgfbhidl) | Communication | 1,000 | 4.95 | 2026-11-10 | Live |
| [Email Detective for Outlook: Identify ESPs & Check Authentication](https://extensiontracker.com/extension/lfhppcapafocegboaeaejkdamebobafo) | Tools | 125 | 5.00 | 2026-11-11 | Live |
| [Sender Icons for Outlook: Spot important emails faster, click fewer ads](https://extensiontracker.com/extension/fadlcnhbikiloleedmhnlnppocoeechn) | Communication | 11 | – | 2026-10-29 | Live |

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/developer/u43578471b072a418d7368f1d9facebe2>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Every page except search comes as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.