Da*****★★★★★
Seems to work great for my usage. I wanted to send (Medium) articles from behind a subscription paywall to my Kindle for reading later. Other options charge monthly fees, but dotEPUB works just as well. While viewing the page, click the extension button, save an .epub file, and e-mail it as an attachment to my magic Kindle address. Within a few seconds, it shows up well-formatted on my Kindle Scribe.