EPUB Read Later by Computerphile

Saves the current page into a growing EPUB. Newest page first. Right-click the toolbar button to clear or re-download.

About this extension

I use this to store web pages in a .epub file (newest save at the top) that I can put on my ereaders to read stuff on the go without having to pick between thousands of "books" (can be a pain on e-readers like the Xteink without touch-screen and search function etc).