Feature Request - integrate ePub support

Old MS Edge had a wonderful ePub reader. New one is my main browser and it would be very nice to have ePub reader back. It would be very convenient to be able to open digital publications and work with them within the browser, with the same ability to annotate and save as is already available for PDFs. That should improve productivity for many and add a point of differentiation compared to vanilla Chom(e/ium).