I deleted your feature request because it was too broad (we agreed on a FR for dictionaries), and contained incorrect information. I made a new one.
I want to reiterate here that we are open about the network connections that the app makes (we have this thread and the list is also in the docs). I asked multiple times to report which EXACT URLs that you see outside of dictionaries but you haven’t given me any.
As addressed in the plugin security thread, there is no mechanism available to us to block their access to the network.
If you are unhappy with the current state of the app, You can add firewall rules to block it from accessing the internet. Perhaps, you can run the app in sandboxed environment, or use something else.