Someone posts a link which has multiple virus scanners reporting the image as being malicious, and you thought that it’s fine to download that file to your machine and open it?
It loading fine has nothing to do with if it’s malicious or not, that’s kinda the whole point of malware and viruses.
Multiple is a stretch when one scanner marks it as malicious and one marks it as suspicious and all the rest report it as fine. It’s very likely a false positive.
Sure, but opening the image in a browser wont run any malware even if there's one concealed inside the image data that can be extracted by specific "innocent-looking" software.
The only possibility of doing something that bad (i.e. running the malware by just opening the image) would be a malformed image that manages to do a buffer overflow in the image parser of the browser (see this recent example: https://chromereleases.googleblog.com/2023/09/stable-channel...)... but I rather think that this specific case is just a false positive.
EDIT: someone in the thread apparently rescanned the file (I didn't check if the file was the same or was modified in-between on the original site) and it indeed appears clean now.