What's Changed

• feat(auth): Add 'VERIFY_AND_CHANGE_EMAIL' linkType for generateEmailActionLink by @utamori in #705
• fix(deps): Bumped golang.org/x/net and golang.org/x/crypto versions by @lahirumaramba in #767
• feat(fcm): Enable fid and deprecate token for Send API by @yvonnep165 in #765
• [chore] Release 4.21.0 by @yvonnep165 in #770

New Contributors

• @utamori made their first contribution in #705
• @yvonnep165 made their first contribution in #765

Full Changelog: v4.20.0...v4.21.0

New Features

• feat(pnv): Add Firebase Phone Number Verification support (#757)
• feat(fcm): Add support for bandwidth constrained and restricted satellite APIs (#750)

Miscellaneous

• [chore] Release v4.20.0 (#763)
• chore: Upgrade Go versions to 1.25, 1.26 (#759)
• chore: Revert release workflow changes to use merge commit (#751)
• chore: Update to Go 1.25 (#743)

New Features

• feat(auth): Add QueryUsers API (#727)
• feat(firestore): Added Firestore Multi Database Support (#733)

Bug Fixes

• fix(auth): Fixed auth error code parsing (#712)

Miscellaneous

• [chore] Release 4.19.0 Take 2 (#746)
• chore: Update Release Workflows for Push triggers (#745)
• Revert "[chore] Release 4.19.0 (#742)" (#744)
• [chore] Release 4.19.0 (#742)
• Update the release actions process (#741)
• chore: Update github actions workflows and integration test resources (#740)
• chore: update copyright headers from Google Inc. to Google LLC (#713)
• chore: Added and AGENTS.md file to instruct AI agents how to interact with this repository (#710)

New Features

• feat(auth): Update ActionCodeSettings to support LinkDomain and deprecate DynamicLinkDomain (#703)

Miscellaneous

• [chore] Release 4.18.0 (#708)
• Bump crypto to 0.40.0 and net to 0.42.0 (#709)

New Features

• feat(rc): Implementation of Server-side Remote Config

Bug Fixes

• fix(fcm): Optimize SendEachInBatch with worker pool (#695)

Miscellaneous

• [chore] Release 4.17.0 (#707)
• Adds new sendEach snippets. (#702)

Bug Fixes

• fix: set go.mod version to actual min version (#699)

Miscellaneous

• [chore] Release 4.16.1 (#700)

New Features

• feat(fcm): Support Proxy field in FCM AndroidNotification (#676)
• feat(fcm): Support for LiveActivityToken field in FCM APNSConfig (#668)

Miscellaneous

• [chore] Release 4.16.0 (#698)
• chore: Update dependencies and platform support (#694)

Miscellaneous

• [chore] Release 4.15.2 (#672)
• chore: Update dependencies (#671)

Miscellaneous

• [chore] Release 4.15.1 (#660)
• chore: Add X-Goog-Api-Client metric header to outgoing requests (#655)
• chore(deps): bump github.com/golang-jwt/jwt/v4 from 4.5.0 to 4.5.1 (#651)

New Features

• feat(fcm): enable direct_boot_ok as bool in Android config (#638)

Bug Fixes

• fix(fcm): Change DirectBootOK per Go initialisms (#645)

Miscellaneous

• [chore] Release 4.15.0 (#649)
• chore: Add X-Goog-Api-Client header to Auth and FCM requests (#648)
• chore: Upgrade Go version support (#647)
• chore: Skip integration tests for deprecated FCM APIs (#646)
• chore: update integration test resources (#633)