static const Rule rules[] = {
        /* class      instance    title       tags mask     isfloating   monitor */
        { "Gimp",     NULL,       NULL,       0,            True,        -1 },
        { "Firefox",  NULL,       NULL,       1 << 8,       False,       -1 },
        { "Chromium", NULL,       NULL,       1 << 1,       False,       -1 },
        { "Clementine",  NULL     NULL,       1 << 2,       False,       -1 },

};