Hey there!

What you're experiencing is a very interesting problem. Please have a look at the following links below for the solution (from cases similar to yours):

https://support.mozilla.org/en-US/questions/1193636

Web Push notifications in Firefox - https://support.mozilla.org/en-US/kb/push-notifications-firefox

How to stop FF from making automatic connections - https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections

Hope I helped!

Kind regards,

Bithiah

Bithiah, thank you for your reply.

https://support.mozilla.org/en-US/questions/1193636

- - This one refers to malware. I went through that and none seem to be the problem.

Web Push notifications in Firefox - https://support.mozilla.org/en-US/kb/push-notifications-firefox

- - This was brilliant, did not know of this. But none of the attempted connections
were there, very few sites were in any case.

How to stop FF from making automatic connections - https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections

- - Certainly a useful list. But not applicable for me here. It's not protections of any
kind, nothing to do with Mozilla, list or addon updates, etc; home page set to blank; 

not prefetching etc.

I am puzzled.

btw - deleting all history cookies etc does not solve this. And it's mostly sites i have recently looked at. But have closed.

This is still happening, can't find any solution. Anyone?

All notifications are blocked too.