Feature: Deprecate Mutation Events (Deprecated)

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Registration for Mutation Events Deprecation Trial

• https://chromestatus.com/feature/5083947249172480
• Up to Chrome 134 (ends with the rollout of next Chrome release), no later than 14 May 2025

Google asked me to register a token to be able to use this functionality until May 14, 2025. The question is where do I add this token?