diff -up surf_orig/config.def.h surf/config.def.h
--- surf_orig/config.def.h	2012-12-03 20:34:56.395583317 +0100
+++ surf/config.def.h	2012-12-03 20:38:07.085389213 +0100
@@ -66,6 +66,7 @@ static Key keys[] = {
     { MODKEY,               GDK_i,           scroll_h,   { .i = +1 } },
     { MODKEY,               GDK_u,           scroll_h,   { .i = -1 } },
 
+    { 0,                    GDK_F11,    fullscreen, { 0 } },
     { 0,                    GDK_Escape, stop,       { 0 } },
     { MODKEY,               GDK_o,      source,     { 0 } },
 
diff -up surf_orig/surf.c surf/surf.c
--- surf_orig/surf.c	2012-12-03 20:34:56.395583317 +0100
+++ surf/surf.c	2012-12-03 20:37:38.712715758 +0100
@@ -46,7 +46,7 @@ typedef struct Client {
 	gint progress;
 	gboolean sslfailed;
 	struct Client *next;
-	gboolean zoomed;
+	gboolean zoomed, fullscreen;
 } Client;
 
 typedef struct {
@@ -101,6 +101,7 @@ static void die(char *str);
 static void drawindicator(Client *c);
 static gboolean exposeindicator(GtkWidget *w, GdkEventExpose *e, Client *c);
 static void find(Client *c, const Arg *arg);
+static void fullscreen(Client *c, const Arg *arg);
 static const char *getatom(Client *c, int a);
 static char *geturi(Client *c);
 static gboolean initdownload(WebKitWebView *v, WebKitDownload *o, Client *c);
@@ -399,6 +400,15 @@ find(Client *c, const Arg *arg) {
 	webkit_web_view_search_text(c->view, s, FALSE, forward, TRUE);
 }
 
+void
+fullscreen(Client *c, const Arg *arg) {
+	if(c->fullscreen)
+		gtk_window_unfullscreen(GTK_WINDOW(c->win));
+	else
+		gtk_window_fullscreen(GTK_WINDOW(c->win));
+	c->fullscreen = !c->fullscreen;
+}
+
 const char *
 getatom(Client *c, int a) {
 	static char buf[BUFSIZ];