The Facebook profile picture viewer URL is generally safe to use. However, as with any online activity, there are some precautions to take:

Facebook does not allow users or third-party apps to track who has viewed a profile or a specific profile picture. Any website claiming to be a "Facebook Profile Picture Viewer" that asks for your login credentials should be treated as a security risk [0.5.7]. Use Cases for Profile URLs

https://scontent-lga3-1.xx.fbcdn.net/v/t1.6435-9/123456789_101234567890123_1234567890123456789_n.jpg?_nc_cat=101&ccb=1-7&_nc_sid=...

Understanding why so many people search for a "profile picture viewer URL" reveals a deeper trend in social media psychology.

You can also right-click the image and select to get a direct link to the image file itself. On Mobile App: Navigate to the profile and tap the profile picture. Select "See Profile Picture."