Tangram is a GNOME desktop application written in JavaScript (GJS) that functions as a specialized browser for managing web applications as persistent, sandboxed tabs. It uses GTK4, Libadwaita, and WebKitGTK to render each tab independently, with per-tab settings (name, URL, user agent, notification priority) stored via GSettings. The application provides a tab overview (Adw.TabOverview), navigation controls, and integrates with the GNOME notification system. It is packaged as a Flatpak and supports translations via Weblate. The codebase is well-structured, modular, and follows modern GNOME development practices, with unit tests for URL utilities and web app metadata extraction.