If you want to view public information without logging in, you can use a private browser window or log out of Facebook entirely. However, this won’t give you access to private profiles or stories. For stories, Facebook’s own feature notifies users when their story is viewed — there is no legitimate way around that.
If you want to keep your activity low-key on Facebook, consider adjusting your own privacy settings, using a secondary account (within FB’s rules), or simply not interacting with content you don’t want to be associated with. anonym facebook viewer
I understand you're looking for information about an "anonymous Facebook viewer" — a tool or service that claims to let you view Facebook profiles, stories, or posts without the other person knowing. If you want to view public information without
