User:J. H. Tobin/global.css

.masthead-avatar > img { transition-duration: 2s; } .masthead-avatar > img:hover { content: url("https://vignette.wikia.nocookie.net/ghostbusters/images/5/5e/JohnHoraceTobinIDW8-4.jpg/revision/latest?cb=20190504192920&path-prefix=ru") !important; }