Hello !
I ran into the problem that I need to track the installation/removal of an extension, but as it turns out, I can’t do that on the front-end side. I can only ask the Metamask developers to write some kind of message in the console so that I can track installation/deletion by it.
Now there is a problem: if you uninstall the extension and try to address any request to Metamask, without refreshing the page the browser thinks that “window.ethereum” exists. Also the installation situation: if you go to the site, install the extension and try any request, the browser will not see “window.ethereum” without reloading the page.
Hey @Zimka!
You may be interested in MetaMask Flask, where you may be able to develop what you are looking to do through a Snaps plug-in 
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