m40 release notes for firestore
# Unreleased
+# 17.1.5
+- [changed] Firestore now recovers more quickly from bad network states.
+- [changed] Improved performance for reading large collections.
+- [fixed] Offline persistence now properly records schema downgrades. This is a
+ forward-looking change that allows you to safely downgrade from future SDK
+ versions to this version (v17.1.5). You can already safely downgrade versions
+ now depending on the source version. For example, you can safely downgrade
+ from v17.1.4 to v17.1.2 because there are no schema changes between those
+ versions. (#134)
+
# 17.1.4
- [fixed] Fixed a SQLite transaction handling issue that occasionally masked
exceptions when Firestore closed a transaction that was never started. For
