# RatioLookup

> Privacy-first phone, email, and mail-header intelligence with local analysis, explainable risk signals, and optional public-web lookup.

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

## Overview

- **ID:** `ratiolookup`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** RatioWorks
- **Category:** privacy-security,search-tools
- **Version:** 0.5.0
- **Last updated:** 2026-09-18
- **First published:** 2026-09-15
- **Size:** 37 KB
- **Data as of:** 2026-09-19
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/ratiolookup/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/ratiolookup/privacy/](https://addons.mozilla.org/firefox/addon/ratiolookup/privacy/)

## Description

RatioLookup is a privacy-focused phone number, email address, and email-header intelligence tool from RatioWorks.
Analyze information directly from Firefox with an emphasis on understandable results and minimal data exposure.
Features
Phone-number format and numbering-region analysis
Email address and domain analysis
Email-header and mail-routing inspection
SPF, DKIM, and DMARC result interpretation when present in supplied headers
Explainable risk indicators showing why a result was flagged
Public-web lookup available only when explicitly requested
Context-menu lookup for selected text
Copyable reports and diagnostic information
Responsive interface designed for Firefox desktop and Android

## Rankings

- #139,598 — Overall
- #132 — lookup

## Permissions and access

### Permissions

- `contextMenus`

## Safety

- **Risk impact:** Very low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- This extension was recently updated in the past month. New updates 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/ratiolookup)