The most interesting aspect of this phenomenon isn't the technology, but the exploitation. The demand for anonymous viewing has created a prime vector for phishing and malware.
While the idea of anonymous story viewing might seem appealing, there are several risks and limitations to consider: facebook story viewer anonymous
100% safe from malware, 100% works with Facebook’s terms of service (as long as you aren't harassing anyone). Cons: It takes 10 minutes to set up. If the target has their story set to "Friends Only," you will need the ghost account to be friends with the target, which defeats the purpose. The most interesting aspect of this phenomenon isn't
Many third-party apps or browser extensions that promise anonymity are designed to scrape your personal data or infect your device with malware. Never provide your Facebook login credentials to a third-party "viewer" site. Cons: It takes 10 minutes to set up