Short answer: Yes, for offline Career Mode, Kick-Off, and Tournaments.
Long answer: The tool does not inject code into the game's memory permanently. It uses a virtual file system (VFS) similar to Frosty. EA Anti-Cheat will detect it if you try to go online in Ultimate Team or Volta. This can lead to a temporary ban (first offense: 7 days; second: permanent). Always launch in offline mode when using the manager.
Also, download the manager only from trusted platforms. Malicious actors have created fake "110 Top" downloads that include keyloggers. Verified sources include: fifa mod manager 110 top
Note: FMM 1.10 requires that the EA App or Steam be running in the background, but you must not launch the game directly from those platforms. Always launch through the Mod Manager.
FIFA Mod Manager does not permanently alter the game’s core files (which would get you banned instantly or break the game). Instead, it creates a "Patch". Short answer: Yes, for offline Career Mode, Kick-Off,
This method is "safe" because to uninstall mods, you simply remove the patch folder, and the game reverts to its vanilla state.
As EA Sports transitions fully to the "FC" branding, the modding scene faces new challenges. However, the community has responded with the "110 Top" standard as a benchmark for future tools. Developers are already working on a FIFA Mod Manager 120 Extreme and modular patching systems that will allow over 200 mods simultaneously. Note: FMM 1
The key takeaway: mastering FIFA Mod Manager 110 Top today prepares you for the next generation of football game modding.