Graphcheckr

Name: Graphcheckr
Author: ShadowNine

Audit Open Graph, SEO meAudit Open Graph, SEO metadata, and social previews on any page in one click.tadata, and social previews on any page in one click.

This add-on was removed from Firefox Add-ons Store on 2026-08-27

Overview

Removed

Daily users

Data as of 2026-08-27

Version:

0.1.1

Last updated: 2026-06-12

Download

Features & Capabilities

Graphcheckr helps you check whether the current web page has the metadata needed for clear search results and rich link previews.

Instead of opening page source or manually searching through the document head, Graphcheckr gives you a focused one-click audit of the active page. It highlights missing, broken, or incomplete tags and presents the results in a readable interface.

Graphcheckr checks common page metadata, including Open Graph tags, card metadata, title, description, canonical URL, viewport, charset, robots directives, favicons, theme color, structured data, sitemap references, and app-related metadata.

The extension is built for developers, site owners, content teams, and testers who want a fast way to catch metadata issues before publishing or sharing a page.

Key features:

Inspect Open Graph metadata
Review title, description, canonical URL, viewport, charset, and robots tags
Detect missing or incomplete metadata
Preview detected sharing images
Find favicons, app icons, theme color, and app metadata
Detect structured data when available
Discover sitemap references when available
View checks grouped by clear categories
See pass, warning, fail, or info status for each check
Get a weighted score and overall result
Switch between light, dark, and system themes
Supports English and Swedish

Graphcheckr only audits the page you are currently viewing when you interact with the extension. It does not request broad host permissions and is designed for the single purpose of helping you verify page metadata.

Source code: https://github.com/ShadowNineX/Graphcheckr

User Growth & Download Statistics

Add-on

By:

ShadowNine

Daily users:

Version:

0.1.1 Last updated: 2026-06-12

Version code:

6303407

Creation date:

2026-06-03

Firefox add-on GUID:

graphcheckr@shadownine.dev

Firefox add-on numeric ID:

3021703

Firefox on Android:

Risk:

Permissions:

Size:

297.54KB

Email:

al*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-08-27

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:

ShadowNine

Firefox Add-ons Store

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

Email:

al*****@gmail.com

Website:

https://github.com/ShadowNineX/Graphcheckr

Is Graphcheckr 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.

Graphcheckr 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.

Graphcheckr may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.