Despite sharing a common Chromium codebase, browser makers like Brave, Opera, and Vivaldi don't have plans on crippling support for ad blocker extensions in their products -- as Google is currently planning on doing within Chrome.
The three browsers makers have confirmed to ZDNet, or in public comments, of not intending to support a change to the extensions system that Google plans to add to Chromium, the open-source browser project on which Chrome, Brave, Opera, and Vivaldi are all based on.