I can not open any folder or directory as root. I installed the Nautilus admin extension and it does not work!

    edivan This has been affecting me for several years as well, though it does work partially.
    I can view (note: read, not write) most folders that require root to be viewed, and I can edit (via "Edit as Administrator") text files that require root to be written to.

    For all else, I just use use the terminal, except for cases I need something graphical, in which case I run "sudo nautilus".