This might seem like a wacky thing to ask, it does to me, but does the browser window need to remain open for an algo to continue live trading?

Reason I ask is, i just launched an algo today to live trade. I closed the browser window, because I thought the algo would be running in the cloud. But, when I came back later and logged in, the algo hadn't been running. I might have goofed up and not started the algo, but I'm pretty sure I did.

I'm just curious what you all have experienced.