# Reading Ruler

> Adds a reading ruler to help follow lines while reading.

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

## Overview

- **ID:** `reading-rulerrr`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** vinwin
- **Category:** privacy-security,photos-music-videos
- **Version:** 1.0
- **Last updated:** 2025-04-17
- **First published:** 2025-04-14
- **Size:** 8.56 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/reading-rulerrr/)

## Rankings

- #138,543 — Overall

## Permissions and access

### Permissions

- `activeTab`

### 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

- [The Reading Ruler](https://chrome-stats.com/d/the-reading-ruler) — 72 users, 5.00 / 5
- [Vertical Reading Ruler](https://chrome-stats.com/d/vertical-reading-ruler)
- [Reading Helper Ruler](https://chrome-stats.com/d/reading-helper-ruler) — 6 users
- [Reading Ruler with Notes](https://chrome-stats.com/d/reading-ruler-with-notes)
- [Reading Ruler Plug in](https://chrome-stats.com/d/reading-ruler-plug-in) — 5 users
- [Dynamic Reading Ruler](https://chrome-stats.com/d/dynamic-reading-ruler) — 1 users
- [Ruler](https://chrome-stats.com/d/z-ruler) — 96 users, 3.55 / 5
- [Reading Ruler](https://chrome-stats.com/d/readingruler) — 846 users, 4.86 / 5
- [Fixed Ruler Mode](https://chrome-stats.com/d/fixed-ruler-mode)
- [Reading Ruler Overlay](https://chrome-stats.com/d/reading-ruler-overlay)
- [Page Ruler Tool](https://chrome-stats.com/d/page-ruler-tool) — 1 users
- [Multi-Ruler Mode](https://chrome-stats.com/d/multi-ruler-mode)

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