Five stars from

1. entity check - owner traces back to real person, freely found online, one star
2. support - open source github, where issues can be raised, two stars
3. security - no real issues found, good suggestions*, three stars :
https://github.com/nunoarruda/auto-save-html

* including one via email to the owner, who posted it to the "issues" himself. Good sign!

It would be useful, if the file name under which the website is stored would be freely selectable. One can always save the file under the same name and the number of generated files would be reduced.

Thank you!

very useful for me

It works well! Automatically saves pages whose URL matches a regular expression. Thanks!