For those who play the game version 1.3, OptiFine is a software add-on that enables you to play the game using a Java-based browser. OptiFine works as a tool for downloading and installing required updates/patches in order to keep your computer optimized and free from any security holes. However, it has been reported by many that this is a "double-edged" tool as it could also install spyware (malware) onto your system. This means that although OptiFine is completely safe, it's important to use it with caution - read on to find out how.
If you've just downloaded OptiFine for Minecraft, you should already have the mod installed. If you don't - skip to step 2 on the installation process below. This will ensure that the mod is working properly. To add the OptiFine for Minecraft download to your game, first open up the game's Options page. At the very bottom, you'll see a link labeled "Download with OptiFine", which will take you to the download section of the options menu.
Click on this link to begin the download process of OptiFine for Minecraft. It'll take you just a few minutes, and then all that's left to do is select your mappings and select "OK". OptiFine for Minecraft now utilizes your system's default settings to provide better graphics and higher performance than what's usually found in the game. These new features will make your gaming experience much more enjoyable. You can opt to use OptiFine's advanced features to customize your gameplay and increase the quality of your graphics.