# ESI testing extension

> Extension allows to debug ESI sites

Canonical page: [https://chrome-stats.com/d/esi-testing-extension](https://chrome-stats.com/d/esi-testing-extension)

## Overview

- **ID:** `esi-testing-extension`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Dima Kurilo
- **Category:** web-development,other
- **Daily users:** 3
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.6.1resigned1
- **Last updated:** 2024-04-25
- **First published:** 2018-03-17
- **Size:** 23 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/esi-testing-extension/)

## Description

ESI testing extension is a Firefox add-on that allows users to debug and test ESI sites, such as those made with Symfony. It adds Surrogate-Capability header and replaces ESI tags with actual HTML, providing information about loaded ESI fragments in the Web Inspector Console and the extension's popup.

## Rankings

- #52,720 — Overall
- #41 — testing
- #115 — fragment

## Permissions and access

### Permissions

- `activeTab`
- `<all_urls>`
- `webRequest`
- `webRequestBlocking`
- `webNavigation`
- `storage`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/esi-testing-extension)