You need a torrent client like BitTorrent or µTorrent to handle this. Please follow these links for more info. What is: [http://en.wikipedia.org/wiki/Torrent_file Wikipedia explanation of the .torrent file system] How to use: [http://lmgtfy.com/?q=how+to+use+torrents+guide Let me Google that for you] Welcome to a better web experience with Firefox, Dimitri! Be sure to check out the [https://addons.mozilla.org Mozilla Firefox Addons site] to make your daily browser use even better by adding functions for your every need - here you'll also find many torrent-related addons to make life easier. No reason not to customize your browser to perfection! At the [http://www.getpersonas.com Mozilla Personas site] you can find a visual style to fit your mood, your desktop or your clothes - Your Firefox, Your Style! Personas are easy-to-use themes that let you personalize the look of your Firefox. And last but not least, on the [http://mycroft.mozdev.org/ Mozilla Mycroft Project] pages you can find thousands upon thousands of search engine plugins in any language to add to the search engine field in the upper right corner of your Firefox. Enjoy the Open Web, the Firefox way. :-)