# Performance Map

> Heatmap of resources loaded in the browser using the Resource Timing API

Canonical page: [https://chrome-stats.com/d/performance-map?hl=fr](https://chrome-stats.com/d/performance-map?hl=fr)

## Overview

- **ID:** `performance-map`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Francesco De Stefano
- **Category:** web-development,other
- **Daily users:** 37
- **Rating:** 5.00 / 5 (6 ratings)
- **Version:** 1.2.0
- **Last updated:** 2019-05-15
- **First published:** 2019-05-15
- **Size:** 14 KB
- **Data as of:** 2026-09-07
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/performance-map/)

## Description

Performance Map is a Firefox add-on that generates a front-end performance heatmap of resources loaded in the browser using the Resource Timing API. It provides valuable insights into user experience by indicating when images finished loading and the time it took the browser to load each image.

## Rankings

- #18,472 — Overall
- #7 — performance
- #52 — google maps scraper
- #78 — format
- #95 — resource
- #110 — map

## Permissions and access

### Permissions

- `tabs`
- `activeTab`
- `http://*/*`
- `https://*/*`

## Safety

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

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- 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).

## Similar extensions and apps

- [Page Performance Test](https://chrome-stats.com/d/page-performance-test) — 475 users, 3.75 / 5
- [Performance-Analyser](https://chrome-stats.com/d/performance-analyser) — 221 users, 2.67 / 5
- [Performance Heatmap](https://chrome-stats.com/d/performance-heatmap)
- [Browser Heatmap Visualizer](https://chrome-stats.com/d/browser-heatmap-visualizer) — 10 users
- [Quick Performance Viewer](https://chrome-stats.com/d/quick-performance-viewer)
- [Load Time Plus](https://chrome-stats.com/d/load-time-plus) — 2 users
- [Load timer](https://chrome-stats.com/d/load-timer) — 796 users, 4.68 / 5
- [Page Load Timer](https://chrome-stats.com/d/page-load-timer) — 410 users, 3.40 / 5
- [Page Load Timer](https://chrome-stats.com/d/page-load-time) — 2 users
- [Page Load Timer Plus](https://chrome-stats.com/d/page-load-timer-plus) — 1 users
- [app.telemetry Page Speed Monitor](https://chrome-stats.com/d/apptelemetry) — 1,099 users, 3.93 / 5
- [All-In-One PageSpeed Test](https://chrome-stats.com/d/all-in-one-pagespeed-test) — 409 users, 4.45 / 5

---

Source: [Chrome-Stats](https://chrome-stats.com/d/performance-map?hl=fr)