There seems to be a problem with Sunrise TV when watching with FireFox web browser. The account profiles are not available, and the saved recordings are not visible.
This seems to be a Firefox problem, checked with version 130.0.1 and with all AdBlockers disabled. Testing with Slimjet, version 43.0.9.0 based on Chromium 122 the profiles and saved recordings worked OK.
Hope this is useful for someone, and thanks to Sunrise Support for helping with the problem.