Hello,
This is the first I hear of a performance problem related to life automation. Since you are using firefox, you could run a performance recording from the web developer tools. Then recreate the issue, get your game to slow down, and try to identify what is using all this performance.
I find it unlikely that it would be caused by the life automation auto-purchase option so I suspect what you are experiencing is caused by something else. It runs every 500ms but it should be very lightweight.
If you believe you can constantly reproduce, you can try to send me your save (it's just a small text file) and give me steps and I can look into it.
I have no idea what Bitwarden does.
