Internet security

[dtgblue]

I have been using a dongle for internet connection but it ran out recently when I needed to use a web site. I tried with trepidation the default site that was available even though it said it was insecure, and had no probs with connection. Just how safe is this connection ie is it the same as using the available wifi in Wetherspoons pubs etc. Just what can people gain access to on this connection? I only use sites such as AB Facebook and my football team.

[dtgblue]

Forgot to mention I have got a brand name anti virus firewall etc