How do I install FirmaSupplementaries?

Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. Download the .jar. Put it in the .minecraft/mods folder and launch that loader profile. Opens on CurseForge — not every file is mirrored on our own servers.

What Minecraft version does FirmaSupplementaries work with?

The listing gives Minecraft 1.21.1, 1.20.1. This is the version stated by the author or source site, not something we verified ourselves.

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FirmaSupplementaries

Java mod listed for Minecraft 1.20–1.21. Downloads from the MC Java Mods app on Android.

by JotredDev · on CurseForge

Which build do you need?

This mod ships a separate file for every mod loader and every version of the game. Pick both, then download — the wrong build installs fine and then does nothing in the game.

Mod loader

Mod loader NeoForge2 builds
Mod loader Forge1 build

Minecraft version

Minecraft 1.21.1Newest
Minecraft 1.20.1

Minecraft 1.20.1Newest

⬇ Download for 1.21.1 · NeoForge ⬇ Download for 1.20.1 · NeoForge ⬇ Download for 1.20.1 · Forge

I don't know my version or loader

Open the Minecraft launcher and look at the profile you play on — it names both, like fabric-loader-1.21.4. The version also shows in the bottom-right corner of the game's main menu.

No loader in the profile name? Then it's plain Minecraft, and these mods won't run — you need Fabric or NeoForge installed first.

Open in MC Java Mods Get it on Google Play →

This mod aims to provide compatibility between Supplementaries by the Supplementaries Dev Team and the total conversion mod TerraFirmaCraft (TFC) by the TFC Dev Team. As an addon, it requires both Supplementaries and TFC to work.

The changes done for compatibility are extensive, but to name a few important things:
- Recipes adjusted for items obtainable in TFC
- Light sources burn out like in TFC. Now you can use candle holders, sconces, and fire pits as balanced light sources!
- Sacks now act more like large vessels, but they can be used to also transport large items
- Pancakes, Candy, and Goblets work with TFC. Nutrition, expiration dates, all working (even with pancakes placed down as blocks!)
- Gunpowder trails can light up TFC blocks, everything from powderkegs to blast furnaces and firepits

A more extensive list of changes, including details like config settings can be found on the github README.txt file.
If you have any issues, please report them on github!

Quick facts

Edition: Minecraft Java
File type: .jar
Minecraft versions listed: 1.21.1, 1.20.1
How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.

Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.

File checked by MCModsHub

Ships as firmasupps-1.3.1.jar — drop this file into the mods folder
Download size: 407 KB
Download link checked 2 Oct 2026 — working

These come from our own check of the pack file, not from the source page.

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