# Reading Ruler Overlay

> Thêm một dải ruler ngang bán trong suốt để tập trung vào dòng đang đọc, có nút ON/OFF và chỉnh độ cao.

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

## Overview

- **ID:** `reading-ruler-overlay`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** hi88moicom
- **Category:** other
- **Version:** 1.0
- **Last updated:** 2025-11-25
- **First published:** 2025-11-22
- **Size:** 9.58 KB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/reading-ruler-overlay/)

## Rankings

- #137,686 — Overall
- #229 — overlay

## Permissions and access

### 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

- [Reading R Overlay](https://chrome-stats.com/d/reading-r-overlay)
- [Image Ruler Overlay](https://chrome-stats.com/d/image-ruler-overlay) — 1 users
- [Reading Ruler](https://chrome-stats.com/d/reading-rulerrr)
- [Screen Dimmer Overlay 2](https://chrome-stats.com/d/screen-dimmer-overlay-2)
- [Quick No1tes Overlay](https://chrome-stats.com/d/quick-no1tes-overlay)
- [Font 1ze Booster](https://chrome-stats.com/d/font-1ze-booster)
- [Screen Dimmer Overlay](https://chrome-stats.com/d/screen-dimmer-overlay)
- [Reading Time Badge](https://chrome-stats.com/d/reading-time-badge)
- [Pixel Ruler on Image](https://chrome-stats.com/d/pixel-ruler-on-image) — 2 users
- [Reading1ogress Bar](https://chrome-stats.com/d/reading1ogress-bar)
- [Font Size Smart Adjuster](https://chrome-stats.com/d/font-size-smart-adjuster)
- [Reading Ruler with Notes](https://chrome-stats.com/d/reading-ruler-with-notes)

---

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