Greasy Fork is available in English.
Shows images and videos behind links and thumbnails.
< Valutazione su Mouseover Popup Image Viewer
I can't reproduce the problem and I don't understand from the description what exactly is the problem...
If png image is scaled down to fit browser window than preview is messed up. Issue exists in Firefox.
Clean Firefox + MPIV demonstration: https://i.imgur.com/QDuzXOL.mp4
Thanks. Should be fixed in the new version.
Thank you for a quick fix!
High resolution PNG images (scaled down to fit browser window) with transparent Alpha Channel are previewed incorrectly: as if several layers of the same image are stacked together. Small resolution PNGs don't have this issue.