Self-Perfection [1] filed a deletion request for kde-thumbnailer-fb2 [2]: Not needed anymore, thumbnail generator for FB2 included within KDE: https://phabricator.kde.org/D18738 Upstream abandoned it, see https://www.linux-apps.com/p/1080816 Just enable it (Dolphin settings → General → Previews → eBooks) [1] https://aur.archlinux.org/account/Self-Perfection/ [2] https://aur.archlinux.org/pkgbase/kde-thumbnailer-fb2/