> brave-core-ext.s3.brave.com fetches 5 extensions and installs them. It is said that this might be a backdoor. But I don’t want to get conspiracist. I prefer giving you verifiable facts. I’ll limit myself to inform you about suspicious activities. Okay, so which 5 extensions? There has to be more information on this somewhere. Article seems kind of lazy and definitely loses steam after the second half.
* https://spyware.neocities.org/articles/brave.html
... which doesn't really add anything to the original assertion as we don't know what the extensions might do. The statement is all all there is.