I have found that over the last several weeks when trying to access sites that are local on my network from my iPhone or iPad like Jellyfin, Proxmox for example, that after every time I restart my device I will have to go into Settings and disable then re-enable the Local Network access setting for Firefox for it to load the site correctly. I do not have any issues getting to the sites when using Safari. This issue was first noticed in iOS 26.0.1 and has continued now that I am on 26.1. Firefox is currently on the latest version and has been updated many times throughout the weeks within a couple of days of the updates releasing. I do not have this issue when using Firefox on macOS.

-iCloud Private Relay is disabled completely for my devices. -Limit IP address tracking is turned off for my network. -Allow cross-website tracking is disabled in Settings for Firefox (and has always been). -Custom DNS servers are set at the router and issued directly. -I have signed out of Firefox, uninstalled the app and reinstalled a couple of times now with no changes.