Couple of quick thoughts on how to protect yourself from having a formerly trustworthy extension go rogue on you:

- https://github.com/beaufortfrancois/extensions-update-notifi...

And then you can do whatever you feel is an appropriate amount of research whenever a particularly privileged extension gets updated (check for transfer of ownership, etc.)

- brave://flags/#brave-extension-network-blocking

You can then create custom rules to filter extension traffic under brave://settings/shields/filters

e.g.:

  ! Obsidian Web
  *$domain=edoacekkjanmingkbkgjndndibhkegad
  @@||127.0.0.1^$domain=edoacekkjanmingkbkgjndndibhkegad