Using Firefox View, I am unable to view my tabs from other devices after setting up Sync. It is saying ''Check your internet connection. If you’re using a firewall or proxy, check that Firefox has permission to access the web.'' as if I don't have a correctly configured connection. However I indeed do and am able to browse the web without any issues. I should mention that I'm running the latest stable flatpak and I'm wondering if this could be related but I have no idea how to manipulate the flatpak to make this work.