Apropos -
[Sigil] Window size not saved
You might think after 40+ years of building WIMP interfaces we could get the saving of Window sizes right.
I have 'all sorts if problems' with Win 10 and Office 2016 window sizing - sometimes the starting window is reduced to

in the top left corner.
Grabbing a resize handle in that situation is a major PITA for me. Other times the window is about a ¼ of the size in which i left it, from which I have difficulty getting it to stretch full height - I have to move it down to the bottom edge and then stretch it upwards -- often several times over to get it to 'stick'.
And every time I update calibre portable some of its modal dialogue windows are almost as big as my 24" 2560x1440 monitor
I've also found Firefox Quaintum for Windows doesn't put its hand up as a candidate PDF handler. Maybe that'll get fixed when Firefox gets even more Blinking Chromified
BR