Card Caliper

Name: Card Caliper
Author: frighten

By: frighten Add-on

Measure trading-card centering with adjustable guides and local edge detection. Works for card images on any website.

Overview

Firefox Add-ons Store

Daily users

Data as of 2026-09-11

Version:

0.6.0

Last updated: 2026-08-16

Features & Capabilities

Card Caliper helps collectors inspect left/right and top/bottom card centering without downloading photos or sending them to another service.

Right-click a trading-card image and choose Card Caliper. The extension opens a focused measurement view with adjustable outer-card and inner-print guides, centering percentages, zoom and pan controls, image rotation, an optional grid, and configurable guide styling.

Card Caliper can estimate the outer card edge and printed border locally. Automatic results are a starting point, not a professional grade; every guide remains manually adjustable for glare, sleeves, holders, perspective, and unusual card designs.

User Growth & Download Statistics

Add-on

By:

frighten

Daily users:

Version:

0.6.0 Last updated: 2026-08-16

Version code:

6413098

Creation date:

2026-08-13

Firefox add-on GUID:

card-caliper@fleeced.dev

Firefox add-on numeric ID:

3053678

Firefox on Android:

Risk:

Permissions:

Size:

12.13MB

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-11

Compare stats and ranking:

Ranking

# 111,645 ▲ 269

Other rankings

#81 in card keyword 21 ▼ 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:

frighten

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/card-caliper/

Is Card Caliper 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.

Card Caliper 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.

Card Caliper 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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