I found out for firefox the message only appears when I'm using private browsing mode or set it to never remember history. Not sure what's up with chromium though. These errors apply when running The Question on this page as well.
I'm on windows 10
My game runs in firefox but I keep getting the following message pop up whenever a choice is made: Warning: Write Error: A mutation operation was attempted on a database that did not allow mutations
In chromium the game completely shuts down by windows defender claiming that it has detected ransomware.
This happens just launching it out of renpy before uploading to itch.io
Do you have any idea if I might be doing something wrong?