# Codex Stellarium

> Astronomy inspired custom animated new tab page

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

## Overview

- **ID:** `codex-stellarium`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** snes
- **Category:** appearance,tabs
- **Daily users:** 54
- **Weekly downloads:** 5
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.1
- **Last updated:** 2026-07-20
- **First published:** 2026-04-11
- **Size:** 37 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/codex-stellarium/)
- **Website:** [https://github.com/snes19xx](https://github.com/snes19xx)

## Description

A custom animated new tab page for Firefox. Replaces the default new tab with an interactive starfield, planetary system, and comet simulator.

Features
<ul><li><strong>Canvas Animations:</strong> Interactive comets, planetary orbits, and a parallax starfield.</li><li><strong>Dynamic Theme:</strong> Auto-switches between light and dark modes based on local time.</li><li><strong>Live Data:</strong> Displays current weather (via Open-Meteo API), lunar phase, and sidereal time.</li><li><strong>Shortcuts:</strong> Configurable quick links.</li></ul>
Installation
<ol><li>Install the extension in Firefox.</li><li>For the intended visual experience, pair this extension with the corresponding <code>userChrome.css</code> modifications found at <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/a3d5273712b13e23bf028e5da2e1838a1dc8100e99405ef946650196d3dd80f4/https%3A//github.com/snes19xx" rel="nofollow">https://github.com/snes19xx</a>.</li></ol>
Privacy

This extension makes external network requests to <code><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/3b46733cff02b987f530f608fab4aed0987b0a843b9ca50b9b84651cb21e0970/http%3A//api.open-meteo.com" rel="nofollow">api.open-meteo.com</a></code> and <code><a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/3780fb5770510b646e74112356973c986a829547d5d00c1fa3bef940fcc985bb/http%3A//geocoding-api.open-meteo.com" rel="nofollow">geocoding-api.open-meteo.com</a></code> to fetch weather and location coordinates. It does not collect, store, or transmit personal telemetry or user data to the developer.

Created by <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/a3d5273712b13e23bf028e5da2e1838a1dc8100e99405ef946650196d3dd80f4/https%3A//github.com/snes19xx" rel="nofollow">snes</a>.

## Rankings

- #15,499 — Overall
- #146 — qr code
- #228 — codes

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `*://*.open-meteo.com/*`

## Safety

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

### Analysis details

- Can alter new tab settings; fairly benign but with some capability to affect user experience.
- 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/codex-stellarium)