Only download social media tools from official sources like the Apple App Store Google Play Store , as they are vetted for security. secure your own Facebook privacy settings to prevent others from seeing your information? Who views your Facebook profile | Facebook Help Center
See if you have friends in common who might be able to show you a specific post or photo. facebook private profile viewer by istaunch portable
The best way to protect your digital life is to respect the privacy settings of others and avoid downloading "portable" tools from unverified sources. Only download social media tools from official sources