what does name with gear icon in Chrome network requests table mean?

[cdxdpeng]

The gear icon signifies that these requests came from the Service Worker itself. Specifically, these are the requests being made by the Service Worker's install handler to populate the offline cache.

[Igor2122]

and how to disable it ?

[varaprasadh]

and how to disable it ?

do you want to block requests being made from a service workers?