# Performance Map

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

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

## Overview

- **ID:** `performance-map`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Francesco De Stefano
- **Category:** web-development,other
- **Daily users:** 36
- **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:** 2026-09-08
- **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

- #18,609 — Overall
- #7 — performance
- #52 — google maps scraper
- #77 — format
- #95 — resource
- #111 — 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).

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