v67.4.0 (2026-06-09)

Full changelog

• General
  • Updated to glean_parser v19.1.1 (#3426, #3470)
  • Increase pending ping limits to better support long network outages (bug 2040030)
    • New glean.upload.pending_pings_deleted metric added to differentiate between deletions due to pending ping count or directory size limitations
    • Default pending pings allowed before deletion raised from 250 to 500, and the directory size before deletion increased from 10MB to 50MB.
    • New configuration fields added to allow integrating applications to override the maximum pending pings count and directory size limits.
  • Add first-class Sessions support: configurable session management (Auto, Lifecycle, Manual modes), session-level sampling, glean.session_start/glean.session_end boundary events in the events ping, and per-event session metadata for downstream analysis (bug 2020962)
• Rust
  • Experimental: Introduce glean-sym, a Rust API built on top of the Glean UniFFI C FFI (#3426)
  • client_info.os_version can now be set by the application. If unset Glean still uses the auto-detection (#3419)
• Android
  • Updated Kotlin to 2.3.21 (#3456)
  • The Gradle plugin now uses the modern AGP variant API, making it compatible with AGP 9 (maintaining AGP 8 compatibility) (#3472).