如果您无权访问 Firebase 控制台中的项目，请检查您是否有权访问 Google Cloud Console 中的项目。您可以在 Google Cloud Console 的IAM页面中查看项目成员列表，包括 Owner。
如果您项目的所有者无法再执行所有者的任务（例如，离开您公司的人）并且您的项目不是通过 Google Cloud 组织管理的（请参阅下一段），您可以联系 Firebase 支持以获取指定的临时所有者。
请注意，如果 Firebase 项目是 Google Cloud 组织的一部分，则它可能没有所有者。相反，管理您的 Google Cloud 组织的人可以执行所有者可以执行的许多任务。但是，要执行多项特定于所有者的任务（如分配角色或管理 Google Analytics 属性），管理员可能需要为自己分配实际的所有者角色来执行这些任务。如果您找不到 Firebase 项目的所有者，请联系管理您的 Google Cloud 组织的人员为项目分配所有者。
为什么或何时应该为项目成员分配所有者角色？
为确保正确管理 Firebase 项目，它必须有一个Owner 。项目所有者是可以执行多项重要管理操作（例如分配角色和管理 Google Analytics 属性）的人，而 Firebase 支持人员只能满足已证明的项目所有者的管理请求。
为 Firebase 项目设置所有者后，请务必及时更新这些分配。
请注意，如果 Firebase 项目是 Google Cloud 组织的一部分，则管理您的 Google Cloud 组织的人员可以执行所有者可以执行的许多任务。但是，对于一些特定于所有者的任务（如分配角色或管理 Google Analytics 属性），管理员可能需要为自己分配实际的所有者角色来执行这些任务。
Cloud Functions for Firebase 依赖于一些付费的 Google 服务。使用 Firebase CLI 11.2.0 及更高版本的新功能部署依赖于Cloud Build和Artifact Registry 。 Deployments to older versions use Cloud Build in the same way, but rely on Container Registry and Cloud Storage for storage instead of Artifact Registry. Usage of these services will be billed in addition to existing pricing.
Storage space for Firebase CLI 11.2.0 and newer versions
Artifact Registry provides the containers in which functions run. Artifact Registry provides the first 500MB at no cost, so your first function deployments may not incur any fees. Above that threshold, each additional GB of storage is billed at $0.10 per month.
Storage space for Firebase CLI 11.1.x and prior versions
For functions deployed to older versions, Container Registry , provides the containers in which functions run. You'll be billed for each container required to deploy a function. You may notice small charges for each container stored—for example, 1GB of storage is billed at $0.026 per month .
To understand more about how your bill might change, please review the following
Does Cloud Functions for Firebase still have no-cost usage?
Yes. On the Blaze plan, Cloud Functions provides a no-cost tier for invocations, compute time, and internet traffic. The first 2,000,000 invocations, 400,000 GB-sec, 200,000 CPU-sec, and 5 GB of Internet egress traffic is provided at no cost each month. You'll be charged only for usage above those thresholds.
After the first 500MB of no-cost storage, each deployment operation will incur small-scale charges for the storage space used for the function's container. If your development process depends on deploying functions for testing, you can further minimize costs by using the Firebase Local Emulator Suite during development.
Is Firebase planning to raise the quotas and limits for Cloud Functions for Firebase?
No. There are no plans to change the quotas except for the removal of a maximum build time limit; instead of receiving errors or warnings when the daily build quota of 120 minutes is reached, you'll be billed under the terms of the Blaze pricing plan. See Quotas and limits .
Can I get the Google Cloud $300 credit?
Yes, you can create a Cloud Billing account in the Google Cloud Console to get the $300 credit, then link that Cloud Billing account to a Firebase project.
Note that if you do this, you have to then set up the Blaze pricing plan in the Firebase console in order for your project to continue working after the $300 credit is exhausted.
I want to follow a codelab to learn about Firebase. Can you give me a temporary billing account?
No, sorry. You can use the Firebase emulator for development without having a Cloud Billing account. Alternatively, try applying for a Google Cloud free trial . If you're still having trouble paying your bill because of this change, contact Firebase Support.
I'm worried I'm going to rack up a huge bill.
You can set up budget alerts in the Google Cloud Console to help control costs. Also, you can set limits on the number of billed instances created for each of your functions. To get an idea of costing for typical scenarios, see the Cloud Functions Pricing examples.
To use extensions, you will need to upgrade to the Blaze pricing plan. You will be charged a small amount (typically around $0.01 per month for the Firebase resources required by each extension you install (even if they are not used), in addition to any charges associated with your use of Firebase services.
Privacy
Where can I find information about privacy and security in Firebase?
Do the Firebase SDKs log any usage/diagnostic information outside of Analytics?
Yes. This is currently iOS-only, but may change in the future. The Firebase Apple platforms SDK includes the FirebaseCoreDiagnostics framework by default. This framework is used by Firebase to collect SDK usage and diagnostics information to help prioritize future product enhancements. FirebaseCoreDiagnostics is optional, so if you would like to opt out of sending Firebase diagnostic logs, you can do so by unlinking the library from your application. You can browse the full source, including logged values, on GitHub
A/B Testing
A/B Testing: How many experiments can I create and run?
You are allowed up to 300 experiments per project, which could consist of up to 24 running experiments, with the rest as draft or completed.
AdMob
AdMob: Can I link my Windows apps to Firebase?
No, Windows apps are not currently supported.
AdMob: Why can't I link my app to AdMob from the Firebase console?
You can link an AdMob app to a Firebase app via the AdMob console. Learn how.
AdMob: What permissions or access do I need to link a Firebase app to an AdMob app?
In order to do this linking, you need the following access:
AdMob : You need to be an AdMob admin.
Firebase : You must have the firebase.links.create permission, which is included in the Owner role and the Firebase Admin role .
Google Analytics : You must have the Edit role or Manage Users role for the property associated with the Firebase project. Learn more.
AdMob: Can multiple users in the same AdMob account link AdMob apps and Firebase apps?
AdMob: To use AdMob, should I use the Firebase SDK for AdMob or the Google Mobile Ads SDK?
For iOS projects , use the Google Mobile Ads SDK: pod 'Google-Mobile-Ads-SDK'
For Android projects , use the Google Mobile Ads SDK: implementation 'com.google.android.gms:play-services-ads:21.3.0'
Note that the Firebase Android SDKs for AdMob transitively include the Firebase SDK for Google Analytics. So, if your app calls any Google Analytics APIs and you switch to using the Google Mobile Ads SDK, make sure that you explicitly add the dependency for the Firebase SDK for Google Analytics ( com.google.firebase:firebase-analytics ) to your app's build.gradle file.
Analytics: Why is Google Analytics a recommended part of using Firebase products?
Google Analytics is a free and unlimited analytics solution that works with Firebase features to deliver powerful insights. It enables you to view event logs in Crashlytics, notification effectiveness in FCM, deep link performance for Dynamic Links, and in-app purchase data from Google Play. It powers advanced audience targeting in Remote Config, Remote Config personalization, and more.
Google Analytics acts as a layer of intelligence in the Firebase console to provide you with more actionable insights about how to develop a high quality app, grow your user base, and earn more money.
Analytics: How do I control how my Analytics data is shared with the rest of Firebase?
By default, your Google Analytics data is used to enhance other Firebase and Google features. You can control how your Google Analytics data is shared in your project settings anytime. Learn more about Data sharing settings .
Analytics in my iOS app: Can I install Analytics without ad attribution and IDFA collection features?
Analytics: Why don't I see any data after unlinking my app from Google Analytics?
Your analytics data resides within the Google Analytics property - not within the Firebase project. If you delete or unlink the property, then your data is unlinked from your project as well. The data still resides in that property, however, and you can always relink it to your project. Creating a new Google Analytics account (and new property) will result in having a blank analytics dashboard in the Firebase console.
Analytics: How do I segment users who have not met some criterion?
You can reframe the problem by "negatively targeting" these users. For example, reframe the problem as "Don't show ads to people who have bought something", and form an audience of those users to target.
Analytics: Are audiences and/or events defined in the Google Analytics interface also available in the Firebase console?
Your audiences and user properties will be synced. For some features, you'll need to use the Google Analytics interface, such as segmentation and closed funnels. You can access the Google Analytics interface directly via deep-links from the Firebase console.
Any changes you make from the Firebase console can also be performed in Google Analytics, and those changes will be reflected in Firebase.
Analytics: What changed in the Google Analytics section with the October 2021 update?
Analytics: What is the new fully upgraded Google Analytics account?
You can read more about the new Google Analytics upgrade in our blog post .
Analytics: How do I know if I'm using Google Analytics for Firebase or a fully upgraded Google Analytics account?
If you see a link to "View your data in Google Analytics" from the analytics dashboard in the Firebase console, then your project is using a fully upgraded Google Analytics account.
You can also check by viewing the Google Analytics card in the Firebase console (you can access this from settings > Project Settings > Integrations , then click Manage ). If you see a Linked Google Analytics account listed in the Your Google Analytics property section, your project is using the full Google Analytics experience in Firebase. If you do not see a Linked Google Analytics account , your project is using Google Analytics for Firebase.
Analytics: When must I upgrade my Google Analytics for Firebase property to retain service?
Any Firebase project created before July 31, 2019 must be upgraded to the full Google Analytics 4 experience if it hasn't already. (Banners display in the Analytics dashboard if an upgrade is required.) The associated Terms of Service must be accepted by February 15, 2022 to ensure data collection continues and by March 15, 2022 to prevent the deletion of the Analytics property and its data. If you no longer want to use Google Analytics and the associated data, no action is required and the property will be deleted on March 15, 2022.
Analytics: What will happen to my data when I upgrade to the new Google Analytics for Firebase?
This will not affect your existing Firebase project analytics data in the Firebase console.
You will be able to continue using the same dashboard and workflows you are using today, and you will also have access to some advanced features in Google Analytics.
Note that if you decide to enable cross-device reporting after making the upgrade, your data will be de-duplicated using the UserID. This may decrease some user counts in the Firebase console.
Analytics: Why do I get an error when trying to upgrade my project to the new Google Analytics experience?
If you are experiencing an error when upgrading, such as:
The operation has failed (Reason: Requested entity
already exists)
or
The operation has failed (Reason: Precondition check failed)
This means that there is an association between your project and an already existing Google Analytics property. You can unlink the property, delete it, or upgrade through the Google Analytics interface.
Firebase Authentication: Which countries are supported for phone authentication?
Firebase Authentication supports phone number verification across the the world, but not all networks reliably deliver our verification messages. The following countries have good rates of delivery, and should be expected to work well for phone number sign in.
How can I make sure I deployed my functions to the Node.js 16 runtime?
In the Firebase console, go to the functions dashboard , select a function, and check the function's language under Additional details .
I use Firebase Extensions. Will I be affected by Cloud Functions runtime updates?
Yes. Since extensions use Cloud Functions , the runtime of your extensions will need to be updated on the same timeline as Cloud Functions.
We recommend that you periodically update to the latest version of each extension installed in your project. You can upgrade your projects' extensions via the Firebase console or Firebase CLI .
Cloud Messaging
Cloud Messaging: What's the difference between the Notifications composer and Cloud Messaging?
Firebase Cloud Messaging provides a complete set of messaging capabilities through its client SDKs and HTTP and XMPP server protocols. For deployments with more complex messaging requirements, FCM is the right choice.
The Notifications composer is a lightweight, serverless messaging solution built on Firebase Cloud Messaging. With a user-friendly graphical console and reduced coding requirements, the Notifications composer lets users easily send messages to reengage and retain users, foster app growth, and support marketing campaigns.
Capabilities
Notifications composer
Cloud Messaging
Target
Single device
Clients subscribed to topics (ie weather)
Clients in predefined user segment (app, version, language)
Clients in specified analytics audiences
Clients in device groups
Upstream from client to server
Message Type
Notifications up to 2kb
Data messages up to 4kb
Delivery
Immediate
Future client device local time
Analytics
Built-in Notifications analytics collection and funnel analytics
Cloud Messaging: Apple announced they're deprecating the legacy binary protocol for APNs. Do I need to do anything?
No. Firebase Cloud Messaging switched to the HTTP/2-based APNs protocol in 2017. If you are using FCM to send notifications to iOS devices, there should be no action required on your part.
Cloud Messaging: Do I need to use other Firebase services in order to use FCM?
You can use Firebase Cloud Messaging as a standalone component, in the same manner as you did with GCM, without using other Firebase services.
Cloud Messaging: I am an existing Google Cloud Messaging (GCM) developer. Should I move to Firebase Cloud Messaging?
FCM is the new version of GCM under the Firebase brand. It inherits GCM's core infrastructure, with new SDKs to make Cloud Messaging development easier.
Benefits of upgrading to FCM SDK include:
Simpler client development. You no longer have to write your own registration or subscription retry logic.
An out-of-the-box notification solution. You can use the Notifications composer, a serverless notifications solution with a web console that lets anyone send notifications to target specific audiences based on insights from Google Analytics for Firebase.
To upgrade from GCM SDKs to FCM SDKs, see the guides for migrating Android and iOS apps.
Cloud Messaging: Why do my targeted devices apparently fail to receive messages?
When it looks like devices haven't successfully received messages, check first for these two potential causes:
Foreground message handling for notification messages . Client apps need to add message handling logic to handle notification messages when the app is in the foreground on the device. See the details for iOS and Android .
Network firewall restrictions . If your organization has a firewall that restricts the traffic to or from the Internet, you need to configure it to allow connectivity with FCM in order for your Firebase Cloud Messaging client apps to receive messages. The ports to open are:
5228
5229
5230
FCM usually uses 5228, but it sometimes uses 5229 and 5230. FCM does not provide specific IPs, so you should allow your firewall to accept outgoing connections to all IP addresses contained in the IP blocks listed in Google's ASN of 15169 .
Cloud Messaging: I have implemented onMessageReceived in my Android app, but it is not being called.
When your app is in the background, notification messages are displayed in the system tray, and onMessageReceived is not called. For notification messages with a data payload, the notification message is displayed in the system tray, and the data that was included with the notification message can be retrieved from the intent launched when the user taps on the notification.
Notifications composer: What's the difference between the Notifications composer and Cloud Messaging?
The Notifications composer is a lightweight, serverless messaging solution built on Firebase Cloud Messaging. With a user-friendly graphical console and reduced coding requirements, the Notifications composer lets users easily send messages to reengage and retain users, foster app growth, and support marketing campaigns.
Firebase Cloud Messaging provides a complete set of messaging capabilities through its client SDKs and HTTP and XMPP server protocols. For deployments with more complex messaging requirements, FCM is the right choice.
Here's a comparison of the messaging capabilities provided by Firebase Cloud Messaging and the Notifications composer:
Capabilities
Notifications composer
Cloud Messaging
Target
Single device
Clients subscribed to topics (ie weather)
Clients in predefined user segment (app, version, language)
Clients in specified analytics audiences
Clients in device groups
Upstream from client to server
Message Type
Notifications up to 2kb
Data messages up to 4kb
Delivery
Immediate
Future client device local time
Analytics
Built-in Notifications analytics collection and funnel analytics
Notifications composer: I am an existing Google Cloud Messaging (GCM) developer, and I want to use the Notifications composer. What should I do?
The Notifications composer is an out-of-the-box solution that lets anyone send notifications to target specific audiences based on insights from Google Analytics for Firebase. Also, the Notifications composer provides funnel analysis for every message, allowing easy evaluation of notification effectiveness.
If you are an existing GCM developer, to use the Notifications composer you have to upgrade from GCM SDKs to FCM SDKs. See the guides for migrating Android and iOS apps.
Cloud Storage for Firebase
Cloud Storage for Firebase: Why can't I use Cloud Storage for Firebase?
Cloud Storage for Firebase creates a default bucket in the App Engine no-cost tier. This allows you to quickly get up and running with Firebase and Cloud Storage for Firebase, without having to put in a credit card or enable a Cloud Billing account. It also allows you to easily share data between Firebase and a Google Cloud project.
There are, however, two known cases where this bucket cannot be created and you will be unable to use Cloud Storage for Firebase:
A project imported from Google Cloud which had a App Engine Master/Slave Datastore application.
A project imported from Google Cloud which has domain prefixed projects. For example: domain.com:project-1234 .
There are currently no workarounds to these issues, and we recommend that you create a new project in the Firebase console and enable Cloud Storage for Firebase in that project.
Cloud Storage for Firebase: Why do I get error code 412 responses about service account permissions and failed service account operations when using the Cloud Storage for Firebase API?
It's likely you're getting 412 error codes either because the Cloud Storage for Firebase API is not enabled for your project or a necessary service account is missing the required permissions.
Cloud Storage for Firebase: Why do I see new service account IDs associated with my Firebase projects that use Cloud Storage for Firebase?
Firebase uses service accounts to operate and manage services without sharing user credentials. When you create a Firebase project, you might notice that a number of service accounts are already available in your project.
The service account that Cloud Storage for Firebase uses is scoped to your project and is named service- PROJECT_NUMBER @gcp-sa-firebasestorage.iam.gserviceaccount.com .
If you used Cloud Storage for Firebase before September 19, 2022, you may see an additional service account on previously-linked Cloud Storage buckets named firebase-storage@system.gserviceaccount.com . As of September 19, 2022, this service account is no longer supported.
You can view all service accounts associated with your project in the Firebase console, on the Service accounts tab .
Adding the new service account
If you removed the service account previously or the service account is not present in your project, you may do one of the following to add the account.
(Recommended) Automated: Use the AddFirebase REST endpoint to re-import your bucket into Firebase. You will only need to call this endpoint once, not once for each linked bucket.
We strongly discourage you from removing the service account because this may block access to your Cloud Storage buckets from your apps. To remove the service account from your project, follow the instructions in Disabling a service account .
Dynamic Links: Why does my Android app access each Dynamic Link twice?
The getInvitation API clears the saved Dynamic Link to prevent it from being accessed twice. Be sure to call this API with the autoLaunchDeepLink parameter set to false in each of the deep link activities to clear it for the case when the activity is triggered outside the main activity.
Firebase Local Emulator Suite
Why do Emulator Suite logs show an error starting with "Multiple projectIds are not recommended in single project mode"?
This message means the Emulator Suite has detected it may be running a particular product emulator using different project IDs. This may indicate a misconfiguration, and can cause issues when emulators try to communicate with one another, and when you try to interact with emulators from your code. If project IDs don't match, it often appears that data is missing, since data stored in emulators is keyed to projectID, and interoperability depends on matching project IDs.
This has been a common source of confusion among developers, so by default the Local Emulator Suite will now only allow running with a single project ID, unless you specify otherwise in the firebase.json configuration file. If an emulator detects more than one project ID, it will log a warning and potentially throw a fatal error.
Check your project ID declaration(s) for mismatches in:
The default project set at the command line. By default, the project ID will be taken on startup from the project selected with firebase init or firebase use . To view the list of projects (and see which one is selected) use firebase projects:list .
Unit tests. The project ID is often specified in calls to the Rules Unit Testing library methods initializeTestEnvironment or initializeTestApp . Other testing code may initialize with initializeApp(config) .
The command line --project flag. Passing the Firebase CLI --project flag overrides the default project. You'll need to ensure the value of the flag matches the project ID in unit tests and app initialization.
Platform-specific places to check:
Web
The projectId property in your JavaScript firebaseConfig object, used in initializeApp .
Android
The project_id property inside the google-services.json configuration file.
Apple platforms
The PROJECT_ID property in the GoogleService-Info.plist configuration file.
To disable single project mode, update firebase.json with the singleProjectMode key:
Hosting: Why does my Hosting release history table in the Firebase console show file counts that are more than what my local project actually has?
Firebase automatically adds extra files containing metadata about the Hosting site, and these files are included in the total file count for the release.
Hosting: What's the largest file size that I can deploy to Firebase Hosting?
Hosting has a maximum size limit of 2 GB for individual files.
We recommend storing larger files using Cloud Storage , which offers a maximum size limit in the terabyte range for individual objects.
Hosting: How many Hosting sites can I have per Firebase project?
Performance Monitoring: How many custom URL patterns can I create?
You can create up to 400 total custom URL patterns per app and up to 100 custom URL patterns per domain for that app.
Performance Monitoring: Why am I not seeing real time display of performance data?
To view real time performance data, make sure that your app uses a Performance Monitoring SDK version that's compatible with real time data processing.
iOS — v7.3.0 or later
tvOS — v8.9.0 or later
Android — v19.0.10 or later (or Firebase Android BoM v26.1.0 or later)
Web — v7.14.0 or later
Note that we always recommend using the latest version of SDK, but any version listed above will enable Performance Monitoring to process your data in near real time.
Realtime Database
Realtime Database: Why was my Realtime Database reported bandwidth lower than average between September 2016 and March 2017?
For our bandwidth calculations, we normally include SSL encryption overhead (based on layer 5 of the OSI model). However, in September 2016, we introduced a bug that caused our bandwidth reporting to ignore encryption overhead. This might have resulted in artificially low reported bandwidth and bills on your account for a few months.
We released a fix for the bug in late March 2017, returning bandwidth reporting and billing to their normal levels.
Realtime Database: What are the scaling limitations of the Realtime Database?
Each Realtime Database instance has limits on the number of write operations per second. For small writes, this limit is approximately 1000 write operations per second. If you are approaching this limit, batching operations using multi-path updates can help you achieve higher throughput.
Realtime Database: What can I do if I'm over my Realtime Database usage limits?
If you've received an email alert or notification in the Firebase console that you've exceeded your Realtime Database usage limits, you can address it based on the usage limit you've exceeded. To see your Realtime Database usage, go to the Realtime Database Usage dashboard in the Firebase console.
If you're over your download limit, you can upgrade your Firebase pricing plan or wait until your download limit resets at the start of your next billing cycle. To decrease your downloads, try the following steps:
Add queries to limit the data that your listen operations return.
Check for unindexed queries.
Use listeners that only download updates to data — for example, on() instead of once() .
Use security rules to block unauthorized downloads.
If you're over your storage limit, upgrade your pricing plan to avoid service disruptions. To reduce the amount of data in your database, try the following steps:
Run periodic cleanup jobs.
Reduce any duplicate data in your database.
Note that it may take some time to see any data deletions reflected in your storage allotment.
If you're over your simultaneous database connections limit, upgrade your plan to avoid any service disruptions. To manage simultaneous connections to your database, try connecting via users via the REST API if they don't require a realtime connection.
Remote Config
Remote Config: Why don't fetched values change the behavior and appearance of my app?
Unless you fetch values with fetchAndActivate() , values are stored locally but not activated. To activate fetched values so that they can take effect, call activate . This design lets you control when the behavior and appearance of your app changes, because you can choose when to call activate . After you call activate , your app source code determines when updated parameter values are used.
For example, you could fetch values and then activate them the next time a user starts your app, which removes the need to delay app startup while your app waits for fetched values from the service. Changes to your app's behavior and appearance then occur when your app uses the updated parameter values.
Remote Config: I am making a lot of fetch requests while developing my app. Why doesn't my app always get the latest values from the service when it sends fetch requests?
During app development, you might want to fetch and activate configs very frequently (many times per hour) to let you rapidly iterate as you develop and test your app. To accommodate rapid iteration on a project with up to 10 developers, you can temporarily set a FirebaseRemoteConfigSettings object with a low minimum fetch interval ( setMinimumFetchIntervalInSeconds ) in your app.
Remote Config: How quickly does the Remote Config service return fetched values after my app sends a fetch request?
Devices usually receive fetched values in less than a second, and often receive fetched values in milliseconds. The Remote Config service handles fetch requests within milliseconds, but the time required to complete a fetch request will depend on the network speed of the device and the latency of the network connection used by the device.
If your goal is to make fetched values take effect in your app as soon as possible, but without creating a jarring user experience, consider adding calls to fetchAndActivate each time that your app does a full screen refresh.
Firebase User Segmentation Storage stores Firebase installation IDs and related attributes and segments as well as audience lists you've created to provide targeting information to other Firebase services that use them, such as Crashlytics, FCM, Remote Config personalization, and more.
