# PX Ruler

> Overlay ruler tool to check sizes and spacing on page

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

## Overview

- **ID:** `px-ruler`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Removed
- **Publisher:** keser
- **Daily users:** 29
- **Version:** 6.72.3
- **Last updated:** 2026-05-11
- **First published:** 2026-03-31
- **Size:** 512 KB
- **Data as of:** 2026-05-18
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/px-ruler/)

## Permissions and access

### Permissions

- `clipboardRead`

## Safety

- **Risk impact:** Low risk impact
- **Risk likelihood:** High risk likelihood

### Analysis details

- Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.
- This extension is not longer available in the store

## Similar extensions and apps

- [Pixel Ruler Overlay](https://chrome-stats.com/d/pixel_ruler_overlay) — 23 users
- [Pixel Ruler](https://chrome-stats.com/d/pixel_ruler) — 7 users
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- [Rabby Wallet](https://chrome-stats.com/d/pixels-ruler-tool) — 7 users, 2.92 / 5
- [Page Ruler](https://chrome-stats.com/d/pageruler) — 1 users
- [Layout Ruler](https://chrome-stats.com/d/layout-ruler)
- [Page Ruler Tool](https://chrome-stats.com/d/page-ruler-tool) — 1 users
- [PixelRuler](https://chrome-stats.com/d/pixelruler) — 29 users
- [ScreenRuler](https://chrome-stats.com/d/screenruler) — 31 users
- [Pixel Ruler Overlay](https://chrome-stats.com/d/pixel-ruler-overlay) — 24 users
- [Pixel Ruler](https://chrome-stats.com/d/pixelsruler) — 7 users, 1.00 / 5

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