If you have the specific username or ID of the profile, you can bypass the login prompt by entering the direct URL into your browser. ://facebook.com Limitations
Some tools claim to have scraped Facebook’s database. They ask for a name and promise to return photos and messages. Facebook Profile Viewer No Account
Have you been scammed by a "Facebook viewer" tool? Share your story in the comments below (but use a throwaway email). Stay safe online. If you have the specific username or ID