You should out below post and also you might mention your suggestion there:
https://websitetoapk.com/forums/427-suggestions-for-update-v3-5

Android.PUA.DebugKey refers to a false positive when you use google test keys pre-configured with Free Edition. There is nothing to worry about as it is surely false positive.

Edit: This issue has been fixed with latest update v4.0.
https://websitetoapk.com/download.html

SSL issue must exist there if it shows like that else it would not.

Further, You need to debug your app to check console error and get to know the exact issue:
https://websitetoapk.com/docs/debugging-with-chrome.html

You can try it with v3.4 to confirm. If issue persists, inform us.

This option simply hides that you are using website inside webview.

Here you go: https://websitetoapk.com/forums/384-extras-option-hide-webview-ua/

@lilloscar +
I vote for options like this, for the use inside in the company, we need to send automatically some results and data.

Check it out:
https://websitetoapk.com/docs/pushadmin-api-access.html

We would like to invite suggestions for an upcoming version. Everyone is requested to contribute with their valuable suggestions.

Ask support here: https://websitetoapk.com/support/submit_ticket

You need to have basic knowledge of JS to get it right. Let's see.

var token = Website2APK.getFirebaseDeviceToken();

When you write above code as mentioned in documentation. the variable token now gets assigned the value of your firebase token string. You can now use 'token' anywhere in your web application. It is as simple as that if you know JS.