Downloading and installing mods for Minecraft version 1.5.0 involves different methods depending on whether you are playing the older or the more modern Bedrock Edition (which includes Pocket Edition, Windows 10, and console versions). Identifying Your Version

This was part of the "Update Aquatic" phase. In this version, mods are called Add-ons and are much easier to install. How to Install Mods For Java Edition 1.5

: Double-clicking these files usually launches Minecraft and installs them automatically.