One way to protect yourself from Endermen is to build Enderman Proof Shelters. Two simple Enderman Proof Shelters are 1, a 2-block high, at least 2-block wide area (2 blocks wide because an Enderman could reach in with its long arms), and 2, which is just a pool of water, but also needs to be at least 2 blocks wide.
The file type .mobi is an eBook format created by a French eBook company called Mobipocket which created a free software application for multiple devices including PDAs, smartphones and tablet devices.
An XPI file is a compressed installation archive used by various Mozilla applications, including Firefox, Thunderbird, and SeaMonkey. it may contain the primary components installed with the software, or may contain an software extension, such as a web browser plug-in.