Skim — Markdown Viewer & Reader

Name: Skim — Markdown Viewer & Reader
Author: Skim

Read markdown beautifully. Open .md files from your computer or the web, with themes, math, diagrams, and AI-agent support.

Overview

Firefox Add-ons Store

Daily users

12 ▲ 2

Data as of 2026-09-08

Version:

2.1.0

Last updated: 2026-07-06

Features & Capabilities

Skim is a markdown viewer and reader for Firefox that renders .md files as clean, themed documents. Open a .md file from your computer or the web and Skim replaces the raw text with a formatted page: tables, task lists, images, and every README.

Built for how people read markdown today: AI coding agents write it constantly. Skim watches the file and auto-reloads the instant it's rewritten, turns YAML frontmatter into a readable header card, and adds a one-click "Copy for AI" button that hands the whole document back as clean markdown.

Full-featured: KaTeX math, mermaid diagrams, syntax-highlighted code with copy buttons, a scrollspy table of contents, light and dark themes, print/PDF export, encoding detection, and per-block RTL/LTR direction.

Skim collects no data: no telemetry, no analytics, nothing sent anywhere. Fully open source (MIT). Every feature is free. Issues: https://github.com/skim-md/skim

User Growth & Download Statistics

Add-on

By:

Skim

Daily users:

12 2

Version:

2.1.0 Last updated: 2026-07-06

Version code:

6336137

Creation date:

2026-07-03

Firefox add-on GUID:

skim@mathematic.ai

Firefox add-on numeric ID:

3033677

Weekly download count:

Firefox on Android:

Risk:

Permissions:

Host permissions:

file:///*

Content scripts matches:

Size:

2.28MB

Email:

su*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-09-08

Compare stats and ranking:

Ranking

# 30,889 ▲ 2,242

Other rankings

#180 in reader keyword 62 ▲ 6#185 in viewer keyword 57 ▲ 6

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:

Skim

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/skim-markdown-viewer-reader/

Email:

su*****@gmail.com

Website:

https://skim.md

Is Skim — Markdown Viewer & Reader 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.

Skim — Markdown Viewer & Reader 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.

Skim — Markdown Viewer & Reader 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 has low user count. Unpopular extensions may not be stable or safe.
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