Guten TAG！

I'm requesting a TAG review of:

• Name: First-Party Sets
• Explainer: https://github.com/privacycg/first-party-sets
• Primary contacts: @mikewest

Further details (optional):

• I am somewhat familiar with the Self-Review Questionnare on Security and Privacy, but have not filled out a survey.
• I have reviewed the TAG's API Design Principles

You should also know that y'all are marvelous.

We'd prefer the TAG provide feedback as:

• open issues in our Github repo for each point of feedback
• open a single issue in our Github repo for the entire review
• leave review feedback as a comment in this issue and @-notify [github usernames]