如果您無權訪問 Firebase 控制台中的項目，請檢查您是否有權訪問 Google Cloud Console 中的項目。您可以在 Google Cloud Console 的IAM頁面中查看項目成員列表，包括所有者。
如果您項目的所有者無法再執行所有者的任務（例如，該人離開了您的公司）並且您的項目不是通過 Google Cloud 組織管理的（請參閱下一段），您可以聯繫 Firebase 支持以分配的臨時所有者。
請注意，如果 Firebase 項目是 Google Cloud 組織的一部分，則它可能沒有所有者。相反，管理您的 GCP 組織的人可以執行所有者可以執行的許多任務。但是，要執行多項特定於所有者的任務（例如分配角色或管理 Google Analytics 屬性），管理員可能需要為自己分配實際的所有者角色才能執行這些任務。如果您找不到 Firebase 項目的所有者，請與管理您的 Google Cloud 組織的人員聯繫，為該項目分配所有者。
為什麼或何時應該為項目成員分配所有者角色？
為確保對 Firebase 項目進行適當管理，它必須具有Owner 。項目的所有者是可以執行多項重要管理操作（例如分配角色和管理 Google Analytics（分析）屬性）的人，而 Firebase 支持人員只能滿足已證明的項目所有者的管理請求。
為 Firebase 項目設置所有者後，保持這些分配是最新的很重要。
請注意，如果 Firebase 項目是 Google Cloud 組織的一部分，則管理您的 Google Cloud 組織的人可以執行所有者可以執行的許多任務。但是，對於一些特定於所有者的任務（例如分配角色或管理 Google Analytics 屬性），管理員可能需要為自己分配實際的所有者角色才能執行這些任務。
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.
I use Firebase Extensions. Will I be affected by this change?
Yes. Since extensions use Cloud Functions , extensions that use Node.js 10 or later will be subject to the same charges as other functions.
To use extensions based on Node.js 10 or later, 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:21.2.0'
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.
Country
Code
AD
Andorra
AE
United Arab Emirates
AF
Afghanistan
AG
Antigua and Barbuda
AL
Albania
AM
Armenia
AO
Angola
AR
Argentina
AS
American Samoa
AT
Austria
AU
Australia
AW
Aruba
AZ
Azerbaijan
BA
Bosnia and Herzegovina
BB
Barbados
BD
Bangladesh
BE
Belgium
BF
Burkina Faso
BG
Bulgaria
BJ
Benin
BM
Bermuda
BN
Brunei Darussalam
BO
Bolivia
BR
Brazil
BS
Bahamas
BT
Bhutan
BW
Botswana
BY
Belarus
BZ
Belize
CA
Canada
CD
Congo, (Kinshasa)
CF
Central African Republic
CG
Congo (Brazzaville)
CH
Switzerland
CI
Côte d'Ivoire
CK
Cook Islands
CL
Chile
CM
Cameroon
CO
Colombia
CR
Costa Rica
CV
Cape Verde
CW
Curaçao
CY
Cyprus
CZ
Czech Republic
DE
Germany
DJ
Djibouti
DK
Denmark
DM
Dominica
DO
Dominican Republic
DZ
Algeria
EC
Ecuador
EG
Egypt
ES
Spain
ET
Ethiopia
FI
Finland
FJ
Fiji
FK
Falkland Islands (Malvinas)
FM
Micronesia, Federated States of
FO
Faroe Islands
FR
France
GA
Gabon
GB
United Kingdom
GD
Grenada
GE
Georgia
GF
French Guiana
GG
Guernsey
GH
Ghana
GI
Gibraltar
GL
Greenland
GM
Gambia
GP
Guadeloupe
GQ
Equatorial Guinea
GR
Greece
GT
Guatemala
GY
Guyana
HK
Hong Kong, SAR China
HN
Honduras
HR
Croatia
HT
Haiti
HU
Hungary
ID
Indonesia
IE
Ireland
IL
Israel
IM
Isle of Man
IN
India
IQ
Iraq
IT
Italy
JE
Jersey
JM
Jamaica
JO
Jordan
JP
Japan
KE
Kenya
KG
Kyrgyzstan
KH
Cambodia
KM
Comoros
KN
Saint Kitts and Nevis
KR
Korea (South)
KW
Kuwait
KY
Cayman Islands
KZ
Kazakhstan
LA
Lao PDR
LB
Lebanon
LC
Saint Lucia
LI
Liechtenstein
LK
Sri Lanka
LS
Lesotho
LT
Lithuania
LU
Luxembourg
LV
Latvia
LY
Libya
MA
Morocco
MD
Moldova
ME
Montenegro
MF
Saint-Martin (French part)
MG
Madagascar
MK
Macedonia, Republic of
MM
Myanmar
MN
Mongolia
MO
Macao, SAR China
MS
Montserrat
MT
Malta
MU
Mauritius
MW
Malawi
MX
Mexico
MY
Malaysia
MZ
Mozambique
NA
Namibia
NC
New Caledonia
NE
Niger
NF
Norfolk Island
NG
Nigeria
NI
Nicaragua
NL
Netherlands
NO
Norway
NP
Nepal
NZ
New Zealand
OM
Oman
PA
Panama
PE
Peru
PG
Papua New Guinea
PH
Philippines
PK
Pakistan
PL
Poland
PM
Saint Pierre and Miquelon
PR
Puerto Rico
PS
Palestinian Territory
PT
Portugal
PY
Paraguay
QA
Qatar
RE
Réunion
RO
Romania
RS
Serbia
RU
Russian Federation
RW
Rwanda
SA
Saudi Arabia
SC
Seychelles
SE
Sweden
SG
Singapore
SH
Saint Helena
SI
Slovenia
SK
Slovakia
SL
Sierra Leone
SN
Senegal
SR
Suriname
ST
Sao Tome and Principe
SV
El Salvador
SZ
Swaziland
TC
Turks and Caicos Islands
TG
Togo
TH
Thailand
TL
Timor-Leste
TM
Turkmenistan
TO
Tonga
TR
Turkey
TT
Trinidad and Tobago
TW
Taiwan, Republic of China
TZ
Tanzania, United Republic of
UA
Ukraine
UG
Uganda
US
United States of America
UY
Uruguay
UZ
Uzbekistan
VC
Saint Vincent and Grenadines
VE
Venezuela (Bolivarian Republic)
VG
British Virgin Islands
VI
Virgin Islands, US
VN
Viet Nam
WS
Samoa
YE
Yemen
YT
Mayotte
ZA
South Africa
ZM
Zambia
ZW
Zimbabwe
Cloud Functions
Cloud Functions runtime support
Why is the Node.js 8 runtime deprecated?
On Dec 31, 2019, Node.js 8 was marked end-of-life by the Node.js Foundation . At that time, the Node.js Foundation stopped issuing security releases for Node.js 8. Because of this, we recommend that you update to Node.js 10 or later as soon as you can.
What happens if a Node.js 8 function is left running after the removal of Node.js 8 support? Will it work indefinitely?
No it will not. Deployment of functions to the Node.js 8 runtime was disabled in the Firebase CLI on December 15, 2020. Execution of already-deployed functions will stop at some point in the future; if you have deployed functions to the Node.js 8 runtime, we recommend that you upgrade to the Node.js 12 runtime .
Redeploy functions using the Firebase CLI v8.1.0 or later.
How can I make sure I deployed my functions to the Node.js 12 runtime?
In the Firebase console, go to the functions dashboard and check the runtime column.
I use Firebase Extensions. Will I be affected by this change?
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 upgrade your Firebase project to the Blaze pricing plan and 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.
Hosting
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.
