# Reading Helper Ruler

> Add a customizable virtual ruler to any webpage to guide your eyes and improve your focus while reading.

Canonical page: [https://chrome-stats.com/d/reading-helper-ruler](https://chrome-stats.com/d/reading-helper-ruler)

## Overview

- **ID:** `reading-helper-ruler`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** GMan
- **Category:** other
- **Daily users:** 6
- **Version:** 2.1.0
- **Last updated:** 2026-07-28
- **First published:** 2025-08-13
- **Size:** 38 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/reading-helper-ruler/)

## Description

Adjust the ruler to your liking: you can configure your preferences individually for each website, ensuring the best reading experience wherever you browse.

## Rankings

- #42,365 — Overall
- #145 — rule
- #182 — trading
- #230 — loading

## Permissions and access

### Permissions

- `storage`

### Host permissions

- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

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

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- 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).

## Similar extensions and apps

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- [Dynamic Reading Ruler](https://chrome-stats.com/d/dynamic-reading-ruler) — 1 users
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- [Reading Ruler](https://chrome-stats.com/d/reading-rulerrr)
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- [Page Ruler Tool](https://chrome-stats.com/d/page-ruler-tool) — 1 users
- [Vertical Reading Ruler](https://chrome-stats.com/d/vertical-reading-ruler)
- [Better Page Ruler](https://chrome-stats.com/d/better-page-ruler) — 35 users, 5.00 / 5
- [Reading Helper](https://chrome-stats.com/d/reading-helper) — 9 users
- [Page Ruler Plus](https://chrome-stats.com/d/page-ruler-plus) — 14 users

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