@Steves-s
Could be, but these type of pop-up and out things worry me.
Its not just an image, 'inside' it lies a piece of programming code. It has to or it wouldn't 'activate' on click/hover.
Its that code that worries me, could be a joke... might launch nuclear armageddon, or just steal your metadata from your browser's history. Like passwords stored there, login details stored there, etc. etc.
As I said, classic 'bad actor' computer infection point.
I'd still leave it be until Firecat gives the all clear, and even then only if he's read the source code for 'backdoors'.
Two minutes it took me to find the attached 'darkweb' site image. Note the URL and only accepts Bitcoin. The internet is full of scumbags just waiting for people to click on animated .gifs on ordinary websites like this. Its how they make their money.
Welcome to the 'Dark Web'!
Murray.
“Every battle is won before it’s ever fought.” - SunTzu. - Cheers.