Firefox 127.0.2, Startpage www.startpage.com
I haven’t seen the icon for this add-on before but just noticed it recycling out of the corner of my eye. I could have loaded it some time in the past of course but can find no reference in my email. Is it now suspicious?
It’s not clear where you see the Startpage icon appearing. When you visit www.startpage.com , they have “Add to Firefox” buttons all over the place.
You must have installed it in the past. AFAIK, it can’t add itself without your acknowledgement.