can someone elaborate on this? it sounds like the image has some numbers that can be traced to your facebook page
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The best way to remove all data is to take a screencap of the image. That only leaves reverse image searching (Google/Tineye/Yandex) or using the photo visual contents as ways to trace the origin.
They had a massive data breach last August affecting 16 million usersWhat is wrong with password managers that keep your passwords on a server (like Lastpass), assuming you trust them to actually encrypt it in a way that only you can decrypt it?
Has the CanvasBlocker extensionHTML 5 Canvas Fingerprinting, a relatively new way of tracking users (even if you're hiding behind a VPN) https://browserleaks.com/canvas
To resist fingerprinting in Firefox. about : config and change privacy.resistFingerprinting to true
Further reading on browser security. https://browserleaks.com/