# Heureca!

> The shortcut to Mystery Cache Solutions. Enriches geocaching.com with a set of tools for decryption and working with coordinates.

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

## Overview

- **ID:** `heureca`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Firefox user 12847222
- **Category:** other
- **Daily users:** 37
- **Weekly downloads:** 1
- **Version:** 0.0.100resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-03-23
- **Size:** 636 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/heureca/)
- **Website:** [https://www.heureca.net](https://www.heureca.net/)

## Description

Heureca! is a toolbox for solving geocaching mystery caches. It extracts formulas on geocaching.com, provides a paperless solution form, injects solutions into geocache checkers, and offers decoding and decipher methods for faster decryption.

## Rankings

- #18,561 — Overall

## Permissions and access

### Permissions

- `contextMenus`
- `identity`
- `storage`
- `tabs`

### Content script matches

- `www.geocaching.com`
- `www.opencaching.com`
- `www.opencaching.de`
- `www.opencaching.pl`
- `www.opencaching.se`
- `www.opencaching.no`
- `www.opencaching.ro`
- `www.opencaching.nl`
- `www.opencaching.us`
- `www.opencaching.ca`
- `www.opencaching.mx`
- `www.opencaching.it`
- `www.opencaching.es`
- `www.opencaching.org.uk`
- `www.opencaching.cz`
- `www.gccheck.com`
- `www.gc-apps.com`
- `geochecker.com`
- `www.geochecker.com`
- `geocheck.org`
- `www.geocheck.org`
- `evince.locusprime.net`
- `geochecker.gps-cache.de`
- `geotjek.dk`
- `www.geotjek.dk`
- `www.heureca.de`
- `www.heureca.net`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate 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/heureca)