@ Oblomov I'm on both Hubzilla and (streams), and actually browsing through a whole server of anything is not possible here.
The best we have is a directory, somewhat similar to that on Mastodon, but also somewhat more powerful in certain aspects. Even there, Hubzilla only lists channels that can speak its native Zot6 protocol, i.e. Hubzilla and (streams) channels. It doesn't list any ActivityPub actors because ActivityPub is provided by an add-on, optional and off by default.
(streams) has ActivityPub support integrated into its core, and its native Nomad protocol is better at working together with non-nomadic ActivityPub things than Zot6, so ActivityPub is on by default. Thus, its directory also lists ActivityPub-based actors.
You can filter the directory only in three ways. One shows only local channels. One shows only safe channels, i.e. such that aren't flagged NSFW. And one only shows group actors. This one is interesting because it shows you all kinds of these as far as they're known to your server: Friendica groups, Hubzilla forums, (streams) groups, Forte groups if there were any, Lemmy communities, Mbin magazines, PieFed communities, nodeBB forum categories, Flipboard magazines...
That said, filtering by string is not possible so you can't single out actors on a certain server. However, in suggestion mode, the results are weighted by how well their profiles match yours and by how many of your contacts are connected to them, somewhat reminiscent of Facebook.
# Long # LongPost # CWLong # CWLongPost # FediMeta # FediverseMeta # CWFediMeta # CWFediverseMeta # Fediverse # Hubzilla # Streams # (streams)