Firebase Remote Config allows developers to dynamically modify the behavior and appearance of an app without releasing a new version. Developers can define parameters in the Firebase console and update values in real time across user segments. This is often used for feature flags, A/B testing, UI personalization, and promotional campaigns. Remote Config supports targeting by user properties, app version, platform, and custom analytics events. It also integrates with Firebase Analytics, allowing developers to optimize features based on data-driven insights.

Firebase Remote Config is partially available in China. While the local caching of parameter values may work under certain conditions, fetching updated configurations from Firebase servers is highly unreliable due to connectivity issues with Google’s infrastructure. Apps may continue using outdated or default values, defeating the purpose of dynamic updates. Since Remote Config APIs call *.googleapis.com and related domains, they are frequently blocked or throttled. Moreover, segmentation based on Firebase Analytics data becomes ineffective if Analytics itself is non-functional in China. Developers targeting Chinese markets generally replace Remote Config with local solutions such as LeanCloud Config, Aurora Config, or custom REST APIs hosted within China. These services allow equivalent control over app parameters, offer region-compliant data handling, and can be combined with local analytics tools for accurate user targeting. For apps operating across borders, region-aware configuration layers can help ensure Remote Config is bypassed or replaced when users are detected in China.

The information regarding service availability in China is provided for general reference purposes only. Due to the dynamic nature of network conditions and regulatory environments, the actual accessibility of these services may vary over time and by location. Users are advised to verify the current status independently.