Optifabric a mod that can be used to run Optifine on the Fabric Mod Loader. It does this by taking the official optifine mod and making it compatible with the Fabric Mod Loader at runtime.
This project does not contain Optifine, you must download it separately!
This project is not related or supported by either Fabric or Optifine.
After installing fabric for 1.14.3, you will need to place the OptiFabric mod jar as well as the latest optifine jar from the official optifine website into your mods folder.
Fabric Loader should be the latest version from the Fabric Website.
If you have any issues please report on the OptiFabric issue tracker that is linked above.