TLDR; something is blocking some (but not all) flatpak connections to the internet, I dont know how to diagnose.
Since a couple of weeks ago I have been experiencing this problem and it is a strange one. I am not sure if it is silverblue, flatpak or the apps.
Platform: Fedora SIlverblue 34 (pre-release)
In flatpaked web browsers (edge, Firefox from Flathub) I cannot access certain urls such as https://www.bbc.co.uk and others seem to be missing some stylesheets (I havent checked but I suspect from CDN’s).
I get a server not found error.
For the normal firefox that is part of silverblue, the same urls work.
I have no proxy and AFAIK no non default settings that would involve connections.
How do I even go about trying to figure out where the problem lies?
EDIT - just checked flatpaked ungoogled-chromium and beta chrome, both display bbc.co.uk but with incomplete style sheets.