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AppHosting startCommand & framework port limitation

emulator: app hostingIssues related to the App Hosting emulatorIssues related to the App Hosting emulator

Status: Open.

#9884 In firebase/firebase-tools;

· FranRiadigos opened on Feb 6, 2026

Cloud billing issue when deploying

type: bug

Status: Open.

#9880 In firebase/firebase-tools;

· LanderBeeuwsaert opened on Feb 5, 2026

Internal error during firebase deploy --only hosting with Next.js 15

api: functions

type: bug

Status: Open.

#9879 In firebase/firebase-tools;

· GScandelari opened on Feb 5, 2026

[MCP] Firebase Crashlytics calls lead to 404 errors

api: crashlytics

api: mcpFirebase MCP ServerFirebase MCP Server

Status: Open.

#9876 In firebase/firebase-tools;

· tt-pkaminski opened on Feb 4, 2026

Firebase CLI and MCP Server both ignoring provided credentials and always falls back to system/user credentials

api: core

type: feature request

Status: Open.

#9870 In firebase/firebase-tools;

· BirjuVachhani opened on Feb 4, 2026

Data Connect Emulator: Parallel gRPC queries fail with "unexpected message 'E'" in 15.4.0+

emulator: dataconnectIssues related to the dataconnect emulatorIssues related to the dataconnect emulator

reproducible

type: bug

Status: Open.

#9866 In firebase/firebase-tools;

· samtsangbiz opened on Feb 3, 2026

"firebase deploy --only hosting" doesnt pick up next.config.ts anymore

integration: web frameworks

Needs: Author FeedbackIssues awaiting author feedbackIssues awaiting author feedback

type: bug

Status: Open.

#9854 In firebase/firebase-tools;

· TrySpace opened on Feb 1, 2026

Data Connect emulator crashes when using <code>uuidV4()</code>

emulator: dataconnectIssues related to the dataconnect emulatorIssues related to the dataconnect emulator

Needs: Author FeedbackIssues awaiting author feedbackIssues awaiting author feedback

type: bug

Status: Open.

#9852 In firebase/firebase-tools;

· ciriousjoker opened on Feb 1, 2026

qs array limit issue

api: core

type: bug

Status: Open.

#9847 In firebase/firebase-tools;

· umrzoq-toshkentov opened on Jan 30, 2026

MCP util.js: Platform detection bug causes 'nul' file creation on macOS

api: mcpFirebase MCP ServerFirebase MCP Server

Needs: Author FeedbackIssues awaiting author feedbackIssues awaiting author feedback

type: bug

Status: Open.

#9823 In firebase/firebase-tools;

· greatimon opened on Jan 28, 2026

Build error possibly due to old re2

api: core

type: bug

Status: Open.

#9781 In firebase/firebase-tools;

· sarahec opened on Jan 21, 2026

specifying <code>--config &lt;path&gt;</code> also loads parts of <code>firebase.json</code>

api: hosting

emulator-suite

reproducible

type: bug

Status: Open.

#9773 In firebase/firebase-tools;

· trullock opened on Jan 21, 2026