The browsers are really starting to clamp down now on HTTP sites. "Insecure website" warnings are popping up and likely to get worse...
Could be worth looking into adding SSL, you can do it for free (long as you keep on top of renewals) via Let's Encrypt: https://letsencrypt.org/
HTTPS
Re: HTTPS
VirtualMin will autorenew certs every 2 months by default, pretty sure Plesk will too, not sure about cPanel but I don't see why it wouldn't, I only know that VirtualMin and Plesk does as I've used both of those Server Control Panel since Let's Encrypt has been more viable to use in the last few years.