Metric Glance

Name: Metric Glance
Author: cach_dies

Converts non-metric units to metric inline on every page as you read. Hover or tap any conversion to see the original, switch units, or correct a mistake. Configurable units, rounding, and formatting. Free and open source.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-07-27

Version:

0.47.1

Last updated: 2026-07-19

Features & Capabilities

Browser extension that converts imperial units to metric inline, for the 95% of the world on metric and the scientific minds in the other 5% who'd rather be.

Converts as you read: lengths, weights, volumes, areas, temperature, speed, and dimension lists (like 4 x 3 x 1 in). Converted values get a dotted underline; hover (desktop) or tap (mobile) to see the original, switch between similar units (the three fluid ounces, US vs imperial gallon, ounce vs troy ounce, and so on), or mark a mistake.

🔍 Missed something? Select the text and open the searchable unit picker from the right-click menu or the keyboard shortcut (Ctrl+Alt+M, Cmd+Alt+M on Mac). Remappable in Firefox's Manage Extension Shortcuts.

💰 Rounds awkward prices: $1.99 becomes $2. You set the threshold — how many cents a price may be nudged up before it rounds, so $1.99 can round while $1.50 stays put.

🔓 Free and open source. On first install a welcome page lets you choose whether to share anonymized training examples to help improve detection. You can change this anytime in Preferences.

User Growth & Download Statistics

Add-on

By:

cach_dies

Daily users:

Version:

0.47.1 Last updated: 2026-07-19

Version code:

6364033

Creation date:

2026-06-15

Risk:

Permissions:

storage
tabs
contextMenus
alarms
notifications
https://mg-collect.metric-glance.workers.dev/*
https://ja-ortiz-uniandes.github.io/metric-glance/privacy.html

Content scripts matches:

<all_urls>

Size:

100.34KB

Email:

me*****@proton.me

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-07-27

Compare stats and ranking:

Ranking

# 52,730 ▲ 29

Other rankings

#80 in cmd/ctrl+m keyword 59 #203 in temperature keyword 12 ▼ 5

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:

cach_dies

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/metric-glance/

Email:

me*****@proton.me

Website:

https://github.com/ja-ortiz-uniandes/metric-glance

Is Metric Glance 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.

Metric Glance requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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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.

Metric Glance is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details

High This extension was recently updated in the past month. New updates may not be stable or safe.
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