MFMP3 is a prepackaged, feature-rich Mozilla Firefox add-on, having all the plug-ins and extensions that you need. All the extensions are preconfigured, so you don't have to bother with that, either. You can install all the extensions or you can choose which ones you want to install and which ones you don't. This edition also can handle your previous Firefox profiles. Version 4.0.2 may include unspecified updates, enhancements, or bug fixes.