Are you sure they have the original size from 10 years ago? I think they may have been saving space/bandwidth back then by only keeping resized versions.
They do, if I open the photo on the fb website and download it, I get the original size. If I download through their takeout service, I get around 800x600 (exact dimensions vary slightly) with no EXIF data.
They actually go the extra mile just to make your life shittier. Such a great company!
