I am getting dodgy looking pop ups at the bottom of my screen. Only on Mumsnet pages. It's not appearing anywhere else. blue top, white main. just sliding up the page, offering things like "3 new driver updates", and sliding back down again, leaving the little blue top bar visible.
It's very annoying. I would have thought it was a virus - but it is only happening on mumsnet pages (I've been checking) so it's you!
Cease and desist forthwith.