The very fact that your firewall knows about these events demonstrates that it is repelling 'attacks'. The reality is that these are very, very unlikely to be attacks at all. They are far more likely to be normal network 'noise', for instance your ISP checking that your connection is still live and healthy. Turn the alerts off, and get on with your browsing.
A ping, for instance, is just a form of handshake between two computers - sort of like a submarine sonar 'pinging' the seabed and surrounding area, to confirm what is in proximity to it.