And thus concludes the internet's decades long transition from a peer community of idea exchange ala UseNet to a broadcast messaging medium controlled by elites for their own benefit ala Bari Weiss' CBS. Welcome to the Dead Internet.
Not sure this particular thing concludes it
Usenet had the Cancelmoose, so message sanitization has always been part of the Internet. In this case, I see this browser extension as purely a tool of the end user and not a blanket threat to the peer community at large.