Merge branch 'master' of github.com:firebase/firebase-js-sdk into markduckworth/sum-avg-3

Author: MarkDuckworth

.changeset/brown-beers-tease.md

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+---
+'@firebase/auth': patch
+---
+
+Increase the popup poller timeout to 8s to support blocking functions + Firefox

.changeset/dry-cats-lick.md

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+---
+"@firebase/firestore": patch
+---
+
+Fixed stack overflow caused by deeply nested server timestamps.

.changeset/friendly-ads-yell.md

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+---
+'firebase': minor
+'@firebase/firestore': minor
+---
+
+Introduces a new LRU garbage document collector for memory cache.

.changeset/grumpy-bees-shake.md

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+---
+'@firebase/analytics': minor
+'firebase': minor
+---
+
+Add method `getGoogleAnalyticsClientId()` to retrieve an unique identifier for a web client. This allows users to log purchase and other events from their backends using Google Analytics 4 Measurement Protocol and to have those events be connected to actions taken on the client within their Firebase web app. `getGoogleAnalyticsClientId()` will simplify this event recording process.

.changeset/olive-cycles-count.md

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+---
+'@firebase/webchannel-wrapper': patch
+---
+
+Make webchannel-wrapper exports Node-ESM-friendly.

.changeset/plenty-radios-look.md

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+---
+'@firebase/webchannel-wrapper': minor
+'@firebase/firestore': minor
+'firebase': minor
+---
+
+Implemented an optimization in the local cache synchronization logic that reduces the number of billed document reads when documents were deleted on the server while the client was not actively listening to the query (e.g. while the client was offline).