# Carbonalyser

> Allows to visualize the electricity consumption and greenhouse gases (GHG) emissions that your Internet browsing leads to.

Canonical page: [https://chrome-stats.com/d/carbonalyser](https://chrome-stats.com/d/carbonalyser)

## Overview

- **ID:** `carbonalyser`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** The Shift Project
- **Category:** web-development,social-communication,other
- **Daily users:** 2,629
- **Weekly downloads:** 19
- **Rating:** 4.55 / 5 (44 ratings)
- **Version:** 1.2.0
- **Last updated:** 2020-01-10
- **First published:** 2019-06-27
- **Size:** 73 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/carbonalyser/)

## Description

**Carbonalyser** is a Chrome extension that visualizes the electricity consumption and greenhouse gas (GHG) emissions caused by your Internet browsing activities. Using data volume measurements and The Shift Project's "1byte" model, it calculates the energy used and resulting GHG emissions based on your selected region's electrical mix. This allows users to see how their digital behavior impacts climate change and natural resources.

Features include starting and stopping real-time analysis, resetting data, ranking the top websites by data volume, and comparing browsing emissions to smartphone charging and car driving. Carbonalyser respects user privacy by processing all data locally without transmitting any information. Source code is openly available for transparency and contribution. This tool encourages responsible digital use and environmental awareness.

## Rankings

- #1,835 — Overall
- #197 — Web Development
- #207 — Social & Communication
- #283 — Other extensions
- #24 — lead
- #114 — internet

## Permissions and access

### Permissions

- `storage`
- `tabs`
- `webRequest`
- `webRequestBlocking`
- `<all_urls>`

## 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).

## Review summary

Overall, users find Carbonalyser functional and useful, offering a fresh way to view browsing activity and its carbon footprint. Positive feedback across languages highlights its potential and practical usability. However, multiple reviews cite issues: the analysis stops when the browser closes and doesn’t auto-restart, limiting long-term studies; the dark-theme icon is hard to find; concerns about calculation accuracy; lack of data persistence or easy long-term data saving; and limited cross-device data consolidation. Users request enhancements like per-period analysis, network-specific views, data export, and multi-device syncing, and welcome ongoing improvements.

### Pros

- Functional and usable in Firefox.
- Provides a fresh perspective on browsing activity and the associated carbon footprint.
- Generally positive reception across languages and users, seen as a promising and useful addition.
- Suggests potential long-term tracking (per day/week/month) and improvement insights.
- Helps users reflect on their browsing habits.

### Cons

- Analysis stops when the browser closes and does not auto-restart, hindering long-term analyses.
- Icon is difficult to locate on dark themes/UI visibility issues.
- Questions about the accuracy of calculations or potential overestimation.
- Lacks convenient data persistence for long-term studies and saving data.
- Limited cross-device data consolidation and syncing (multi-device support).

## Similar extensions and apps

- [Carbonalyser by OMConseil](https://chrome-stats.com/d/carbonalyser-by-omconseil) — 3 users
- [Carbonalyser - fork](https://chrome-stats.com/d/carbonalyser-fork) — 13 users
- [CarbonViz](https://chrome-stats.com/d/carbonviz) — 18 users, 5.00 / 5
- [CO2estimeter](https://chrome-stats.com/d/co2estimeter) — 4 users
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- [Eco-Friendly Browsing](https://chrome-stats.com/d/okeco-friendly-browsing)
- [Eco-Friendly Browsing](https://chrome-stats.com/d/eco-friendly-browsing) — 1 users
- [WeImpactCarbon](https://chrome-stats.com/d/weimpactcarbon) — 1 users, 5.00 / 5
- [Neuto Browser Extension](https://chrome-stats.com/d/neuto-browser-extension)
- [MyCarbone](https://chrome-stats.com/d/mycarbone) — 1 users
- [low—web](https://chrome-stats.com/d/low-web-extension) — 71 users, 4.33 / 5

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