We have tokens that are added to official builds when a CI server is building the production-ready application. These tokens are added to the BuildConfig.java by using the buildConfigField function in a build.gradle.

While testing, you want to quickly regenerate just this file to see changes occur with a new value. Instead of using the more expensive assembleDebug task for your debug variant, you can use generateDebugBuildConfig.

In the Firefox monorepo world for the Fenix module, the fully-qualified task name would look like this:

./mach gradle :fenix:generateDebugBuildConfig