Browser Markdown is a Firefox extension that renders local and remote Markdown, MDX, and text files as readable documents. It supports GitHub-Flavored Markdown, syntax-highlighted code, KaTeX math, Mermaid diagrams, themes, a table of contents, auto-reload, and raw-source toggling.
In the Browser DevTools & extensions space, browser markdown takes a focused approach. It focuses on reading Markdown files cleanly in Firefox without uploading them or opening a separate viewer. It is built as a consumer product for firefox users, developers, and technical writers. browser markdown is free to use. browser markdown is available on the web, embeddable surfaces, and Android.
Behind browser markdown is Jay Suthar, and it first shipped in 2026. The project is developed in the open on GitHub with 41 commits in the last 90 days. Among its 9 catalogued features are markdown rendering, GitHub-Flavored Markdown, and code highlighting. The interface is available in 32 languages, including Czech, German, and Greek.
Summary written by a language model from the project’s public pages.
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