Floating Search Icon

I rarely use my phone for browsing websites coz I use my computer for that matter, and today I just noticed something a bit odd when browsing a specific website. There’s this “magnifying glass” icon that shows up and stays where it is no matter how you scroll down the page. When clicked, it’s apparently a search window where you can type and search words or things on that specific website. It’s annoying though coz it stays right there and there seems to be no option to remove it. I’m using chrome browser and checked browser settings and such but no luck. Anyone have any idea on how to disable this?

I asked the website admin and I was told it’s definitely not a feature or an addon they have on their site.

Attached is a screenshot showing what it looks like.