You mean browser-based, as in provided by a server (aka centralized)? Perhaps there is a way to daemonize the process and run it headless on a server with web access, but the whole point is no central server to depend on.
Edit: I guess I don't understand how this project, which makes one of its key features to be be web server less, would be accessed by web browser without doing what I suggested above. Could you explain?
Browser-based, serverless apps are what Ethereum is all about. You run a daemon on your computer that maintains a blockchain, messaging system (Whisper), and content storage system (Swarm). That daemon exposes an RPC interface so local processes can get data from it. The most common result is an HTML, CSS, and Javascript bundle that is a full-fledged application without a server, because its backend is peer-to-peer.
Web apps aren't a requirement—you could build a traditional desktop app that talks to the Ethereum daemon as well. But using the application runtime that everyone already has installed lowers the barrier to entry, so it's what most successful projects will choose.
It's like you'll also need DNS, which isn't decentralized either.
If someone wanted to write this as a WebRTC-based decentralised version there is nothing stopping them using something the like the public signalling servers that Mozilla uses for their Hello service.
Also, if some users wanted to run a signalling server themselves, that's ok too.
I get your comparison, however DNS is not actually that fundamental to P2P networks, all you need are IP addresses (at least not after the bootstrapping phase). Whereas this is making the entire connection setup dependent on these signalling servers.
You're right, there are public signalling servers and such. I just wish we weren't so restricted in setting up direct connections, such that you could do it through your bootstrapping peer in the network.
I think it's a terrible idea for many reasons. Cite FriendFeed, Diaspora, Identica etc.
But at the same time, if someone wants to try: yes, it needs to be browser based, and the lack of a server doesn't need to be a limiting factor anymore.
Edit: I guess I don't understand how this project, which makes one of its key features to be be web server less, would be accessed by web browser without doing what I suggested above. Could you explain?