Change Default Browser in Big Sur – how to avoid popup window


I found the Change Default Browser Macro, and got it working just fine.

Now, I see a Big Sur "message box" popping up and disappearing very fast, I recorded it, and it shows the question wether I want to change my Default Browser...

CleanShot 2020-12-06 at 18.51.42@2x

Any idea on how to avoid this?