"Now, we're expanding this category to include extensions that handle user-provided content and personal communications. Of course, extensions must continue to be transparent in how they handle user data, disclosing the collection, use, and sharing of that data," noted Chrome's Alexandre Blondin and Swagateeka Panigrahy in a blog post.
Google is asking Chrome developers to inventory their extensions' current permissions, and if applicable, switch to "alternatives with a more narrow scope." After October 15th, any app that violates the new policies risks getting rejected from Chrome's store. Developers can learn more by reading Google's updated User Data FAQ.