In fact it looks like there are already browser extensions that do this for Markdown: https://chrome.google.com/webstore/detail/markdown-viewer/ckkdlimhmcjmikd

In fact it looks like there are already browser extensions that do this for Markdown: https://chrome.google.com/webstore/detail/markdown-viewer/ckkdlimhmcjmikdlpkmbgfkaikojcbjk?hl=en https://chrome.google.com/webstore/detail/markdown-viewer/ck... https://chrome.google.com/webstore/detail/markdown-preview-plus/febilkbfcbhebfnokafefeacimjdckgl?hl=en https://chrome.google.com/webstore/detail/markdown-preview-p...