Installed it and then noticed in my firewall that it is
- trying to connect to a number of IPs owned by google, umm OK
- sending a multicast SSDP UDP request on port 1900 to 239.255.255.250
So googled that and got this page: https://community.brave.com/t/why-is-brave-issuing-upnp-disc...
Which basically tells you that the first thing Brave does is to try and detect what devices are in your local network.
... and that's where my Brave experiment ends.
edit:
Also note that uninstall is completely silent, no confirmation that it actually completed.
The uninstaller also leaves behind the updater utility AND the Windows Task scheduler tasks that run the updater.