If you're interested in viewing someone's display picture on Facebook, here are some best practices:
Often, users use the same profile picture across multiple public platforms like Instagram, LinkedIn, or Twitter, where their privacy settings might be less restrictive. Conclusion fb locked profile dp viewer hot
If you have entered your Facebook credentials into a suspicious website or installed a questionable extension: If you're interested in viewing someone's display picture
Non-friends cannot enlarge or download your profile picture or cover photo. here are some best practices: Often