Thank you, I guess.
1. It's technically impossible
2. Make sure the option "Misc. > save pages in background" is enabled. The missed download bug (when this option is disabled) will be fixed in the version 1.18.50.
This section is intended for reviews. Please report bugs, issues, or regressions here: https://github.com/gildas-lormeau/SingleFile/issues, or contact me by email (cf. link "Support Email"). Please also note that stars should not be used as a "money" to trade features or bug fixes.