diff --git a/config.def.h b/config.def.h
index 2e60daa..54fc50d 100644
--- a/config.def.h
+++ b/config.def.h
@@ -30,7 +30,7 @@ static const Rule rules[] = {
 	 *	WM_NAME(STRING) = title
 	 */
 	/* class      instance    title       tags mask     isfloating   monitor */
-	{ "Firefox",  NULL,       NULL,       1 << 1,       0,           -1 },
+	{ "firefox",  NULL,       NULL,       1 << 1,       0,           -1 },
 	{ "Steam",    NULL,       NULL,       1 << 7,       0,           -1 },
 };
 
@@ -72,7 +72,7 @@ static Key keys[] = {
 	{ MODKEY,                       XK_Return, spawn,          {.v = termcmd } },
 	{ MODKEY|ControlMask,           XK_q,      spawn,          SHCMD("dmenu_quit") },
 	{ MODKEY,                       XK_u,      spawn,          SHCMD("udmenu") },
-	{ MODKEY,                       XK_g,      spawn,          SHCMD("Firefox") },
+	{ MODKEY,                       XK_g,      spawn,          SHCMD("firefox") },
     // Toggle status bar
 	{ MODKEY,                       XK_b,      togglebar,      {0} },
     // Stack manipulation