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Google to weaken ad blockers on Chrome in a push for security
(cybernews.com)
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Yes. Only browsers not based on chromium won't see any effects from this.
It depends on the browser. Not all chromium browsers are including the change in their versions.
Even if a chromium fork is totally splitted, they will SE an effect in that they will be less compatible with the upstream. Most chromium forks rely on their upstream, which will be affected by this.