MikroClick.app

I have a problem with a Safari Extension called Mikro.Click.app. It auto-activates suddenly and opens new Safari Browser Tab. I did not isntall the app and I am unclear how this endedup in my Safari extensions. Also I cannot find any documentation online about this. I moved it into the bin and also zipped it. However, I did that one day ago and the problem re-appeared.

Has anybody experienced the same?

How can it be that this gets installed in my Safari Browser extension?

Where does this App come from?

Can this be an intrusion attempt?