I'm noticing that whenever I download epubs with FFF vs directly from AO3, some of the formatting isn't retained. For example, some elements in the chapter text that are centered in the AO3 version are left-aligned when downloaded via FFF. Usually they're dividers or subheadings within a chapter.
Here's a SFW
link to an example story. The beginning 2 lines after the author's note in the epub downloaded by FFF should be centered, along with the "XXX" dividers throughout the story but everything is left-aligned.
Same with the dividers in this
story, but another weird thing I've noticed with this particular story is that when downloaded via FFF, there isn't a space after a period to separate sentences in the body of the story. It appears normal on AO3 and in the epub that is downloaded directly from AO3, but the epub generated with FFF doesn't have a space after periods.