Selenium

Name: Selenium
Price: 8 EUR
Author: billpapat

This project endeavors to create a comprehensive performance optimization solution by integrating the functionalities of the most widely recognized performance-enhancing mod packs.

by billpapat

1.5K Downloads

0 Followers

fabricMC 1.21.4lightweightmultiplayeroptimization

Rent Selenium Server

Screenshots

About this Modpack

This project endeavors to create a comprehensive performance optimization solution by integrating the functionalities of the most widely recognized performance-enhancing mod packs for fabric.

You may freely incorporate this content within your modpacks, ensuring to cite the respective creators and provide appropriate attribution links.

Available Versions

Selenium 1.21.4release

MC 1.21.4fabric102 downloads

April 1, 2025

Selenium 1.21.4release

MC 1.21.4fabric42 downloads

March 31, 2025

Selenium 1.21.4release

MC 1.21.4fabric58 downloads

January 6, 2025

Selenium 1.21.4 v3release

MC 1.21.4fabric50 downloads

January 2, 2025

Selenium 1.21.4 v2release

MC 1.21.4fabric60 downloads

December 31, 2024

How to Set Up a Selenium Server

Order Server

Choose at least 4 GB RAM (6 GB recommended for Selenium). Based on player count: per 8 players.

Install Modpack in Dashboard

Open the modpack browser in the dashboard, search for "Selenium" and click "Install". The fabric loader and Minecraft 1.21.4 are configured automatically.

Start Server & Play

Start the server – all mods are loaded automatically. Share the server IP with friends and play together!

Frequently Asked Questions

Selenium server crashes or won't start – what to do?

Most common causes: insufficient RAM or wrong fabric loader. Check latest.log for "OutOfMemoryError" → increase RAM to at least 6 GB. For "Mixin" or "ClassNotFoundException" errors: modpack version and loader don't match. With Mado Hosting, loader and Minecraft version are auto-configured on modpack install – preventing most startup issues.

How much RAM does a Selenium server really need?

Minimum 4 GB, recommended 6 GB for stable performance. per 8 players. Important: Minecraft modpacks need more RAM than vanilla – plan extra per additional player. With Mado Hosting, you can scale RAM up live at any time without data loss (from €8/month).

Can I add custom mods to Selenium without conflicts?

Yes, but check compatibility: only use mods for the same loader (fabric) and same Minecraft version (1.21.4). Common issues: ID conflicts with recipe mods and incompatible coremod versions. The Mado dashboard mod browser only shows compatible mods and warns about known conflicts.

Selenium server lagging – performance tips

1) Increase RAM to 6 GB+. 2) Reduce server view-distance to 8 (server.properties). 3) Pre-generate chunks with the "Chunky" plugin. 4) Use /spark profiler to check which mods consume the most tick time. With Mado Hosting, all servers run on NVMe SSDs with dedicated CPU cores – eliminating hardware as a bottleneck.