Something very odd and suspicious happened

I was using my computer, but then my firewall popped up, Firefox was trying to connect to over port 56891. I looked up the IP and found that it belongs to Xobor. However, I only use Firefox for shopping, I never used Firefox to access this forum, I use Waterfox for that. So I’m wondering how Firefox could try to connect to a Xobor IP even though nothing prompted it to, and why it would use such an odd port.

Hi, I have no idea what that is. Maybe these two browsers share some processes/files, so that’s why it appeared from Firefox? Other than that, you could ask Xobor at their support forum, maybe they know.