I can't reproduce it on my Arch machine (Qt5 or Qt6). No extra blank pages at the ends of chapters. I've tried changing font-sizes and resizing the BibiReader window in order to force a blank page to happen, but have been unsuccesful in doing so.
But I'm not seeing a way to change the font in BibiReader. How is it that Times New Roman was determined to be what BibiReader was using on both Windows and Linux? Perhaps I'm missing it but I've looked all over. There's just not that many BibiReader settings.
This is the output of my above bash script, by the way. On my machine, Times New Roman points to the Liberation Serif font.
Code:
serif: NotoSerif-Regular.ttf: "Noto Serif" "Regular"
sans-serif: NotoSans-Regular.ttf: "Noto Sans" "Regular"
monospace: NotoSansMono-Regular.ttf: "Noto Sans Mono" "Regular"
Arial: LiberationSans-Regular.ttf: "Liberation Sans" "Regular"
Helvetica: NimbusSans-Regular.otf: "Nimbus Sans" "Regular"
Verdana: NotoSans-Regular.ttf: "Noto Sans" "Regular"
Times New Roman: LiberationSerif-Regular.ttf: "Liberation Serif" "Regular"
Courier New: LiberationMono-Regular.ttf: "Liberation Mono" "Regular"