A tweak that activates file:// URL support in Mobile Safari. This works well for browsing locally cached or stored files while on the go.

In other words, it solves this problem:

This package uses MobileSubstrate and supports all iOS versions.

Depending on the state of your device, you might not be able to access files in /var/mobile/Media or in all of /var/mobile with this package. (You might get a strange error message when you try to view them.)

If you cannot access those files, this is because Mobile Safari does not have access to those directories due to security measures in iOS. (In recent versions of iOS, Mobile Safari is designed to be in a "sandbox" that limits its access to your user directory, which contains personal information.)