Meta launched Muse, a consumer AI agent built on its Muse Spark model that can navigate websites, fill forms, send emails, book travel, and make payments. The browser sub-agent reads an accessibility-tree snapshot of pages rather than the raw DOM, so semantic structure and accessibility may grow increasingly important for web designers. Reuters reported that internal testing found reliability problems, including an instance where an agent exposed personal iCloud photos, though Meta says added security work delayed the launch.