diff --git a/config.h b/config.h
index 8649e0a..610349f 100644
--- a/config.h
+++ b/config.h
@@ -27,13 +27,16 @@ static const char* colors[][3]      = {
 static const char* tags[] = { "1", "2", "3", "4", "5", "6", "7", "B", "E", "0" };
 
 static const Rule rules[] = {
-	/* xprop(1):
-	 *	WM_CLASS(STRING) = instance, class
-	 *	WM_NAME(STRING) = title
-	 */
-	/* class	     instance	  title		  tags mask	isfloating	 monitor */
-	{ BROWSER,           NULL,	  NULL,		  1<<7,		0,	       	 -1 },
-	{ NULL,              "emacs",     NULL,           1<<8,         0,               -1 }
+        /* xprop(1):
+         *        WM_CLASS(STRING) = instance, class
+         *        WM_NAME(STRING) = title
+         */
+        /* class             instance          title                  tags mask        isfloating         monitor */
+        { BROWSER,           NULL,              NULL,                 1<<7,             0,                   -1 },
+        { "LibreWolf",       NULL,              NULL,                 1<<7,             0,                   -1 },
+        { NULL,              "emacs",           NULL,                 1<<8,             0,                   -1 },
+        { "dlt-viewer",      NULL,              NULL,                 1<<5,             0,                   -1 },
+
 };
 
 /* layout(s) */
@@ -52,15 +55,15 @@ static const Layout layouts[] = {
 /* key definitions */
 #define MODKEY Mod4Mask
 #define TAGKEYS(KEY,TAG) \
-	{ MODKEY,				KEY,	  view,		  {.ui = 1 << TAG} }, \
-	{ MODKEY|ControlMask,			KEY,	  toggleview,	  {.ui = 1 << TAG} }, \
-	{ MODKEY|ShiftMask,			KEY,	  tag,		  {.ui = 1 << TAG} }, \
-	{ MODKEY|ControlMask|ShiftMask,         KEY,	  toggletag,	  {.ui = 1 << TAG} },
+        { MODKEY,                               KEY,          view,               {.ui = 1 << TAG} }, \
+        { MODKEY|ControlMask,                   KEY,          toggleview,         {.ui = 1 << TAG} }, \
+        { MODKEY|ShiftMask,                     KEY,          tag,                {.ui = 1 << TAG} }, \
+        { MODKEY|ControlMask|ShiftMask,         KEY,          toggletag,          {.ui = 1 << TAG} },
 
-#define TAGKEYS_NO_MOVE(KEY,TAG)												\
-	{ MODKEY,				KEY,	  view,		  {.ui = 1 << TAG} }, \
-	{ MODKEY|ControlMask,			KEY,	  toggleview,	  {.ui = 1 << TAG} }, \
-	{ MODKEY|ControlMask|ShiftMask,         KEY,	  toggletag,	  {.ui = 1 << TAG} },
+#define TAGKEYS_NO_MOVE(KEY,TAG)                                                                                                \
+        { MODKEY,                               KEY,         view,          {.ui = 1 << TAG} }, \
+        { MODKEY|ControlMask,                   KEY,         toggleview,    {.ui = 1 << TAG} }, \
+        { MODKEY|ControlMask|ShiftMask,         KEY,         toggletag,     {.ui = 1 << TAG} },
 
 /* #define SHCMD(cmd) { .v = (const char*[]){ "/bin/sh", "-c", cmd, NULL } } */
 
@@ -70,8 +73,8 @@ static const Layout layouts[] = {
 static const char* dmenucmd[]    = { "dmenu_run", "-fn", "monospace:size=14", NULL };
 static const char* termcmd[]     = { "st", NULL };
 #if HAS_SW_BACKLIGHT
-static const char* bright_up[]   = { "brightnessctl", "s", "-q", "3%+", NULL };
-static const char* bright_down[]   = { "brightnessctl", "s", "-q", "3%-", NULL };
+static const char* bright_up[]   = { "brightnessctl", "s", "-q", "1%+", NULL };
+static const char* bright_down[]   = { "brightnessctl", "s", "-q", "1%-", NULL };
 #endif
 
 static void webbookmark(const Arg* unused){
@@ -120,9 +123,9 @@ static const Key keys[] = {
     TAGKEYS(                  XK_5,                       4)
     TAGKEYS(                  XK_6,                       5)
     TAGKEYS(                  XK_7,                       6)
-    { MODKEY,		      XK_b,	                vene_browser,	 {.ui = 1 << 7} },
-    { MODKEY|ControlMask,     XK_b,	                toggleview,	 {.ui = 1 << 7} },
-    { MODKEY|ControlMask|ShiftMask, XK_b,	        toggletag,	 {.ui = 1 << 7} },
+    { MODKEY,                 XK_b,                        vene_browser,         {.ui = 1 << 7} },
+    { MODKEY|ControlMask,     XK_b,                        toggleview,         {.ui = 1 << 7} },
+    { MODKEY|ControlMask|ShiftMask, XK_b,                toggletag,         {.ui = 1 << 7} },
     TAGKEYS_NO_MOVE(          XK_e,                       8)
     TAGKEYS(                  XK_0,                       9) // tag 0
 };