In various websites that use cloudflare's 'browser checks', IceCat 78.8.0 running on GNU Guix get's stuck in a loop, in which the page gets reloading indefinetely. The particular website I found this issue is gitlab.com, in particular it's sign in page ( https://gitlab.com/users/sign_in). I've also found an open issue about it on GNU Guix's bug mailing list ( https://issues.guix.gnu.org/45179) that mentions that at some point this issue potentialy could be fixed by changing the user agent, but it is not the case anymore.
Sincerely João