ruler

Name: ruler
Rating: 4.0789 (38 reviews)
Author: Ian Remmel

By: Ian Remmel

Simple tool for measuring arbitrary parts of a page. Does not and will never contain adware.

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Features & Capabilities

Ruler is a straightforward and lightweight tool designed to measure arbitrary parts of any webpage directly within your browser. Unlike complex or bundled software, Ruler prioritizes simplicity and privacy, ensuring that it never includes any adware or unwanted software.

Ideal for designers, developers, or anyone needing quick and precise measurements on web content, Ruler offers an intuitive user experience without compromising security or performance.

User Growth & Download Statistics

Add-on

By:

Daily users:

Rating:

Version:

2.0.4resigned1 Last updated: 2024-04-25

Version code:

5728619

Creation date:

2017-09-04

Risk:

Permissions:

activeTab

Size:

44.17KB

Email:

de*****@ianwremmel.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 1,032 ▼ 1

Other rankings

#109 in Web Development ▲ 1#3 in rule keyword 8 #122 in contain keyword 28 ▼ 2

For Developers

Monetize with App Pass Boost with Extension Booster

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:

Ian Remmel

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/browser-ruler/

Email:

de*****@ianwremmel.com

Website:

https://github.com/ianwremmel/browser-ruler/issues

User Reviews

Users appreciate the concept and basic functioning of the ruler add-on, finding it useful for measuring elements on webpages. However, many reviews criticize its poor readability, unclear units of measurement, and limited functionality such as lack of resizing, saving figures, and inadequate support for RTL sites. Improvement suggestions include adding hotkeys, better UI customization, and enhanced usability features.

Pros

Some users find the add-on useful for measuring screen elements.
The add-on functions as expected in general use.
Users appreciate the concept of having a ruler tool within the browser.

Cons

The add-on lacks clear units of measurement, causing confusion (px, cm, inch unclear).
Numbers displayed by the ruler are hard to read and positioned poorly, often obstructing the measurement area.
There is no ability to adjust or resize created measurement shapes after placement.
The add-on does not support RTL (right-to-left) websites properly.
Missing important features like hotkeys, ability to save predefined figures, or improve usability (e.g., turning off with Esc).

Recent reviews

Is a completely useless add on. Instead of using this "add on", you can stamp and check on paint

by So*****, 2025-06-06

Seems to have stopped working lately. Unfavourably, because I really found it useful.

by AX*****, 2025-05-19

by 退出*****, 2025-03-23

View all user reviews ›

Is 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.

ruler does not require any sensitive permissions.

Risk impact analysis details

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.

ruler has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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