When I saw the description list FanFiction.net I downloaded this so fast I gave myself a nosebleed! I've begun backing up my favorite AO3 stories to ePUB, and wanted to do the same on FF.net. I expected to save all 17 chapters individually and was shocked when this extension offered the option to pack all chapters together AND save the cover image. Seriously, wow. This is extension is a game changer.