download will only cancel after it has actually begun
when using the X
to abort a download (if the actual download hasn't started yet), the download attempt isn't aborted immediately, it still tries to reach the server and only after the server is reached, the abortion is executed.
usually this is not a big deal but in conjunction with a slow server this may cause confusion because you already tapped the X
20 times but there is no noticeable reaction and it seems that fdroid-classic still tries to download (resp. precisely reach the server).
this may cause even more problems/confusion/panic when using the privileged extension because the installation follows the download with no user interaction (thus possibility to abort).