# Layout Measure

> Measure webpage elements with CAD-style dimensions, spacing guides and box-model highlighting.

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

## Overview

- **ID:** `layout-measure`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Aleksandr Bogdan
- **Category:** web-development
- **Daily users:** 2
- **Weekly downloads:** 3
- **Rating:** 5.00 / 5 (1 ratings)
- **Version:** 1.0.1
- **Last updated:** 2026-09-02
- **First published:** 2026-08-19
- **Size:** 1.49 MB
- **Data as of:** 2026-09-08
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/layout-measure/)

## Description

Layout Measure is a visual inspection and measurement tool for web developers and designers. Activate it on an ordinary webpage to inspect elements, visualize their box-model boundaries and compare spacing using clear CAD-style dimensions.

Features include:
- Hover highlighting and element inspection
- Measurements between selected elements
- Margin, border, and padding visualization
- Support for elements inside Shadow DOM
- Configurable dimension markers and contrast outlines
- Toolbar and keyboard activation (Alt+M)

## Rankings

- #60,837 — Overall
- #56 — layout

## Permissions and access

### Permissions

- `activeTab`
- `storage`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** High 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 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/layout-measure)