Cover image has been a feature of FanFicFare for over a decade, it's not new. Most users generally want them.
It's also a complicated topic. There's a wiki page
Cover Settings Calibre Plugin that documents the various different settings and options.
You can remove covers from existing ebooks manually using using Calibre built-in Edit book or in batches using the
Modify Epub plugin.
You can suppress all future FanFicFare covers in personal.ini with:
Code:
[overrides]
never_make_cover:true
Note that will also prevent the covers from appearing in Calibre as well as in the ebook.