How to Prevent Session Hijacking

If the IP address change prompt me for a password, I'm fine with it. Give that as an option to me. Crawl in the browser only in the YouTube app. I don't care. Why? Because I'm a mobile device. And of course my IP address is going to change every few, you know, whatever,. Every interval. But if I'm hooked to Wi-Fi chances that my eyes people change my IP are very rare. It's not like I use the mouse just literally put my mouse then do it log in, you know? So logging in is not really a problem per say when it comes to that and even if you're prompt, I'll just