This is an extension to clip websites and download them into a readable markdown file. Please keep in mind that it is not guaranteed to work on all websites.
This was forked from an older project by Enrico Kaack, but has been tweaked by me to display the markdown output before downloading it (among other features).
To use this add-on, simply click the add-on icon while you are browsing the page you want to save offline. A popup will show the rendered markdown so you can make minor edits or copy the text, or you can click the download button to download an .md file.
Selecting text will allow you to download just the selected text.