Firefox refuses to visit a single website in my home network, 192.168.1.232: NS_ERROR_CONNECTIONR_REFUSED

I have an unraid server running locally at 192.168.1.232. On my mac laptop and windows desktop, while on my home’s wifi, I can visit a bunch of services and webapps, like immich, sonarr, unraid’s dashboard, etc, by visiting 192.168.1.232:8888 for example. This works on every browser and every computer in my home network except for firefox on this single mac laptop.

When I try to visit http://192.168.1.232:8888 on this macbook using Firefox, I get the following error in the screen:

Unable to connect

An error occurred during a connection to 192.168.1.232.

The network tab says: NS_ERROR_CONNECTION_REFUSED with no other details.

Some other notes:

  • There’s no entry in /etc/hosts for this IP
  • visiting other machines in my network, such as my router at 192.168.1.254, works fine.
  • visiting the server using chrome or safari on this same laptop works fine.
  • I’ve disabled extension, run in private browsing, tried troubleshooting mode, and even reinstalled firefox fresh. (But maybe there’s a setting or cached file somewhere that remained after uninstalling it.)
  • Firefox can visit this server on other computers fine.
  • if I visit using my cloudflare URL, firefox works fine.
  • The services on that server are all working.
  • This only started a couple weeks ago; previously there was no problem. I don’t know what changed, but I know it was around the time I was messing with cloudflare and dns stuff to get some URLs set up with cloudflare-d.

It’s just

  • firefox (v133.0.3)
  • on this laptop (Mac OS Sequoia 15.2)
  • visiting any service/port on this IP (192.168.1.232)

Can you help? Any other thoughts or suggestions? Is there a better way to clean firefox’s installation? Or maybe downgrade to an earlier version of firefox?