Web Design Ruler Firefox

Web Design Ruler

Essential design tools for web designers: pixel-perfect measurements, font identification, and professional color picking.

Features & Capabilities

Web Design Ruler 📏🎨🔠 | The Ultimate Design Assistant

The essential extension for web designers and developers who demand accuracy.

Web Design Ruler combines three powerful tools in one sleek extension, eliminating the need to switch between multiple applications during your design workflow:

🔍 Precise Measurement Tool

Measure any element's width, height, and diagonal dimensions with pixel-perfect accuracy Get exact spacing and alignment information for any webpage element Perfect for UI audits, responsive design testing, and detail-oriented layout work

🔤 Font Identifier

Instantly recognize any font used on a webpage with a single click Discover complete typography details including font family, size, weight, and style Save time searching for perfect typography matches for your projects

🎨 Color Picker

Extract exact colors from any webpage element Get complete color values in HEX, RGB, and HSL formats Maintain perfect color consistency across your designs

Simple, Intuitive, and Powerful Web Design Ruler integrates seamlessly, accessible via icon click or right-click context menu. No complicated setup or learning curve - just the essential design tools you need, when you need them.

Built with Privacy in Mind

✅ Works completely offline - no internet connection required ✅ No data collection or tracking ✅ Minimal permissions - only accesses your active tab when tools are explicitly activated ✅ No ads, bloatware, or unnecessary features

🆕 What's New in Version 1.1

🎉 Complete UI Redesign

Modern, professional interface with intuitive tab navigation Cleaner, more responsive design for better user experience Improved visual feedback and smoother animations

🎭 NEW: Color Palette Manager

Create and save custom color palettes Import/export palettes as JSON files Built-in starter palettes (Material Design, Neutrals, LXB Studio) Save colors from any website to your palettes Right-click to remove colors, rename palettes with ease

✨ Enhanced Features

Recent Colors: Automatically tracks your last 20 picked colors Font Memory: Save detected fonts for future reference Better Color Display: See colors in HEX, RGB, and HSL simultaneously One-click Copy: Copy any color format instantly Visual Measurements: See dimensions visualized in real-time

🐛 Bug Fixes & Improvements

Fixed context menu activation issues Improved tool activation reliability Better error handling and user notifications Removed unused magnifier element from color picker Enhanced keyboard shortcuts (ESC to cancel any tool)

📝 Note This update represents a major overhaul based on user feedback. We've focused on making Web Design Ruler more powerful while keeping it simple and fast. Thank you for your support!

Version 1.1 Summary:

✨ Complete UI redesign with modern interface 🎭 NEW: Color palette manager with import/export 🎨 Track recent colors and save fonts 🐛 Bug fixes and performance improvements

Made with ❤️ by LXB Studio | Visit webdesignruler.com

User Growth & Download Statistics

Manifest V3 Add-on
By:
LXB-Studio
Daily users:
39
Version:
2.0.1 Last updated: 2026-05-23
Version code:
6274805
Creation date:
2025-06-10
Risk:
High risk impact Moderate risk likelihood
Permissions:
Host permissions:
  • http://*/*
  • https://*/*
Content scripts matches:
  • *
Size:
34.97KB
Email:
lx*****@gmail.com
URLs:
Website ,Privacy policy
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-17
Compare stats and ranking:

Other platforms

Chrome
Web Design Ruler (v2.0.1)
45 0.00 (0)

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
LXB-Studio
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/web-design-ruler/
Email:
lx*****@gmail.com
Website:
https://webdesignruler.com/

Permission Change History

2026-01-13: Version 1.1.1 → 2.0.0
Add Host permissions: http://*/* https://*/*
Add Permissions: scripting
Remove Permissions: notifications <all_urls>

Is Web Design Ruler Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Web Design Ruler requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
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Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Web Design Ruler is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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