what is mysysteminjector fr?

This project is a customization tool for Xiaomi phones running MIUI and HyperOS. It lets power users override several annoying behaviors built into Xiaomi's modified Android system, such as aggressive app killing, locked-down app launchers, and restrictions on installing custom fonts. You toggle features on by creating empty files in a specific system folder. Each feature has a codename, so creating a file with that name turns that tweak on. If things go wrong, you can create a file called "disable" to turn everything off, which helps if a tweak prevents the phone from booting normally. The tool targets people who want finer control over their Xiaomi device. For example, one feature stops the system from automatically killing background apps, which the author built because MIUI kept force-closing QQ despite it normally being on a whitelist. Another feature lets you swap in Google's app installer instead of Xiaomi's. There is also a feature that makes Android's dual-app launcher simpler by removing extra confirmation prompts, and one that enables custom font installation on devices that would otherwise block it. Some features are marked as no longer maintained, meaning they may not work on current software. The tool only supports specific older versions of MIUI, and the author notes that development has moved to a newer project called MyInjector.