DatapacksJava
Lawrence's Ambient Fireflies
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.
A small and very lightweight pack that adds fireflies as ambient particles to the Swamp and Mangrove biomes.
It'll work with most other datapacks? It for sure won't work with any other mods/datapacks that directly change swamps/mangrove swamps directly so just keep that in mind.
Will not work on Realms
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.5, 1.21.6, 1.21.7
- 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 Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — see the MC Java Mods guides for the full walkthrough.
Verified by MCModsHub
- Downloads as lawrences-ambient-fireflies.zip
- Download size: 14 KB
- Download link checked 28 Aug 2026 — working
These come from our own check of the pack file, not from the source page.