CustomTagLedger

Name: CustomTagLedger
Author: Derenia9

By: Derenia9

Audit custom element tags, registration state, upgrade timing, shadow roots, and unresolved web component names.

This add-on was removed from Firefox Add-ons Store on 2026-05-19

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Features & Capabilities

CustomTagLedger is a Firefox extension for inspecting custom elements on the active page. It builds a compact ledger of hyphenated tag names, checks whether the browser currently knows a constructor for each name, and highlights unresolved or still-upgrading components. This is useful on pages built with web components, design-system packages, hydrated islands, or component libraries that register elements at runtime. A page can look mostly correct while some custom elements remain undefined, upgrade late, or depend on customized built-in syntax that requires careful browser support checks.

User Growth & Download Statistics

Add-on

By:

Derenia9

Daily users:

Version:

1.0.0 Last updated: 2026-05-15

Version code:

6258081

Creation date:

2026-05-12

Risk:

Permissions:

Size:

36.92KB

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-05-19

Compare stats and ranking:

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:

Derenia9

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/customtagledger/

Website:

https://say88.com.se/

Is CustomTagLedger 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.

CustomTagLedger requires very minimum permissions.

Risk impact analysis details

High Allows reading and modifying clipboard content, which can be sensitive, posing a moderate privacy risk.

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.

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