diff -ur b/config.def.h a/config.def.h
--- b/config.def.h	2011-12-19 21:02:46.000000000 +0600
+++ a/config.def.h	2014-12-02 11:35:25.515349079 +0600
@@ -19,7 +19,7 @@
 static const Rule rules[] = {
 	/* class      instance    title       tags mask     isfloating   monitor */
 	{ "Gimp",     NULL,       NULL,       0,            True,        -1 },
-	{ "Firefox",  NULL,       NULL,       1 << 8,       False,       -1 },
+	{ "Firefox",  NULL,       NULL,       10,       False,       -1 },
 };
 
 /* layout(s) */
@@ -48,11 +48,15 @@
 /* commands */
 static const char *dmenucmd[] = { "dmenu_run", "-fn", font, "-nb", normbgcolor, "-nf", normfgcolor, "-sb", selbgcolor, "-sf", selfgcolor, NULL };
 static const char *termcmd[]  = { "uxterm", NULL };
+static const char *firefoxcmd[]  = { "firefox", NULL };
 
 static Key keys[] = {
 	/* modifier                     key        function        argument */
 	{ MODKEY,                       XK_p,      spawn,          {.v = dmenucmd } },
 	{ MODKEY|ShiftMask,             XK_Return, spawn,          {.v = termcmd } },
+
+	{ MODKEY|ShiftMask,             XK_p, spawn,          {.v = firefoxcmd } },
+
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
 	{ MODKEY,                       XK_j,      focusstack,     {.i = +1 } },
 	{ MODKEY,                       XK_k,      focusstack,     {.i = -1 } },