I was searching for apartments on zillow.com yesterday and a login pop up came up- which included another box giving me option to sign up with my Google address

I was searching for apartments on zillow.com yesterday and a login pop up came up- which included another box giving me option to sign up with my Google addresses. Here's a screenshot: https://i.imgur.com/dYtg5u6.png https://i.imgur.com/dYtg5u6.png It did seem strange to me but I didn't bother because I was busy with the search. Now after reading this post this certainly does not seem strange anymore. Edit: Like OP, I never logged in to Chrome, only on gmail.com.