Modrinth App

1. Open the Modrinth App

2. Click on Library

3. Click on Fabulously Optimized

4. Click on Install content

5. Find the mod or the mods you want to add

6. Click on Install

7. Once installed, go back to the Library

8. Hover over the instance and click on Play. Minecraft should open up

9. If you can see the newly installed content in the Mod Menu, you're done!