The problem

The Mount option is good but requires the user to have already created an empty folder to mount to. This seems to be a little bit of extra work for the basic user.

Requested Solution

A Quick Browse button. This button would create a folder for the user, for example in /tmp or in a known Borg location e.g. ~/.borg and mount the selected Archive for the user. This way a user can quickly access the backup and browser for files. The button would then change to an Unmount button which would unmount the temporary directory and clean up.