keybored
Well done. You remember cat good.
I got one of these yesterday when I was helping someone sort out a problem with their computer, I logged-in to my gmail account remotely (using teamviewer) from their computer and with-in seconds got this email.
New sign-in from Firefox on Windows
Hi ********,Your Google Account ***************@gmail.com was just used to sign in from Firefox on Windows.
Windows
Thursday, August 4, 2016 3:49 PM (Brasilia Standard Time)
Fortaleza - State of Ceará, Brazil*
Firefox
Don't recognize this activity?
Review your recently used devices now.
Why are we sending this? We take security very seriously and we want to keep you in the loop on important actions in your account.
We were unable to determine whether you have used this browser or device with your account before. This can happen when you sign in for the first time on a new computer, phone or browser, when you use your browser's incognito or private browsing mode or clear your cookies, or when somebody else is accessing your account.
Best,
The Google Accounts team
That's normal, they send these when you sign-in from a new location/machine.