What in the world is an XPI file extension? If you are a mozilla firefox user you may find your self asking this question, when downloading or upgrading an add on or plugin.
Firefox is cool because it include tons options as far as customization goes. It’s thousands of plugins make is a sort of swiss army nife. If you can think of something you want Firefox to do, i can most likely do it.
Well the XPI file extension is the file extension associated with firefox plugins, and it’s a sort of zip file if you will. Many files are combined into 1 folder then compressed for faster downloads.
If you are unsure about the file contact the publisher, or look for an alternative plugin.