Show Unified Assignments: Perm Sets + Perm Set Groups

Show all the Permission Sets a user is assigned, regardless whether they’re

directly assigned to a Permission Set, or
indirectly assigned via a Permission Set Group!

⮕ Install from the Chrome Store ⬅

Screenshot showing the User Detail page with the “PermSet List Plus” Chrome Extension installed

Works with any Salesforce instance (production, sandbox, and developer editions).
Works in both Lightning and Classic.
Hugely helpful for Salesforce Administrators, Developers, Architects, and Superusers.

I also recommend creating a Permission-Set-Led security model — trim down to minimal Profiles and lock down your Salesforce instance!