Vanilla limits chat history to only 100 messages that are saved when you scroll up, which really is quite small. This mod increases the limit to over 65000, allowing you to still be able to view messages from a long time ago. Now you no longer miss what your friend said in chat because it was spammed, or no longer lose important messages!!!
This is a client-side mod, meaning only you need it installed and it will work on any server.
Works very well with my other mod, the Server Chat Sync Mod. Go check it out!