Boot Raspberry Pi (raspbian OS) into fullscreen browser. http://blogs.wcode.org/2013/09/howto-boot-your-raspberry-pi-into-a-fullscreen-browser-kiosk/

.info.txt

Update and install requirements:
› sudo apt-get update
› sudo apt-get dist-upgrade
› sudo apt-get install matchbox chromium x11-xserver-utils ttf-mscorefonts-installer xwit sqlite3 libnss3

Curl to desktop, cat file and copy-paste into existing files:
› curl -L --output /home/pi/Desktop/config.txt --get https://gist.githubusercontent.com/klan/7482956/raw/ebe5b60527aad2bec93e23035cbc07ee5b6a3d9b/config.txt
› curl -L --output /home/pi/Desktop/rc.local --get https://gist.githubusercontent.com/klan/7482956/raw/33786a1c5c9448bf30cd037950169679a718fb79/rc.local

Curl new file to location:
› sudo curl -L --output /boot/xinitrc --get https://gist.githubusercontent.com/klan/7482956/raw/3e8db5dd5461dc26f9b5e5adfde841b505565fa3/xinitrc

Reboot and enjoy:
› sudo reboot

config.txt

# (add this to the bottom of /boot/config.txt)

# My settings:
disable_overscan=1
framebuffer_width=1900
framebuffer_height=1200
framebuffer_depth=32
framebuffer_ignore_alpha=1
hdmi_pixel_encoding=1
hdmi_group=2

rc.local

# (add this to the bottom of /etc/rc.local)

# Wait for TV to be turned on
while ! $(tvservice --dumpedid /tmp/edid | fgrep -qv 'Nothing written!' ); do
  bHadToWaitForScreen=true;
  printf "===> Screen is either off, not connected or in an unknown mode, waiting for it to become available...\n"
  sleep 10;
done;

printf "===> Screen is on, extracting preferred mode..\n"
_DEPTH=32;
eval $( edidparser /tmp/edid | fgrep 'preferred mode' | tail -1 | sed -Ene 's/^.+(CEA|̣DMT) \(([0-9]+)\) ([0-9]+)x([0-9]+)[pi]? @.+/_GROUP=\1;_MODE=\2;_XRES=\3;_YRES=\4;/p' );

printf "===> Resetting screen to preferred mode: %s-%d (%dx%dx%d)...\n" $_GROUP $_MODE $_XRES $_YRES $_DEPTH
tvservice --explicit="$_GROUP $_MODE"
sleep 1;

printf "===> Resetting frame-buffer to %dx%dx%d...\n" $_XRES $_YRES $_DEPTH
fbset --all --geometry $_XRES $_YRES $_XRES $_YRES $_DEPTH -left 0 -right 0 -upper 0 -lower 0;
sleep 1;

# Using tailored xinitrc
if [ -f /boot/xinitrc ]; then
  ln -fs /boot/xinitrc /home/pi/.xinitrc;
  su - pi -c 'startx'
fi

exit 0

xinitrc

#!/bin/sh
while true; do

  # Clean up previously running apps, gracefully at first then harshly
  killall -TERM chromium 2>/dev/null;
  killall -TERM matchbox-window-manager 2>/dev/null;
  sleep 2;
  killall -9 chromium 2>/dev/null;
  killall -9 matchbox-window-manager 2>/dev/null;

  # Clean out existing profile profile information
  rm -rf /home/pi/.cache;
  rm -rf /home/pi/.config;
  rm -rf /home/pi/.pki;

  # Generate the bare minimum to keep Chromium happy!
  mkdir -p /home/pi/.config/chromium/Default
  sqlite3 /home/pi/.config/chromium/Default/Web\ Data "CREATE TABLE meta(key LONGVARCHAR NOT NULL UNIQUE PRIMARY KEY, value LONGVARCHAR); INSERT INTO meta VALUES('version', '46'); CREATE TABLE keywords (foo INTEGER);";
  # Disable DPMS / Screen blanking
  xset -dpms
  xset s off

  # Reset the framebuffer's color-depth
  fbset -depth $( cat /sys/module/*fb*/parameters/fbdepth );

  # Hide the cursor (moving to bottom-right)
  xwit -root -warp $( cat /sys/module/*fb*/parameters/fbwidth ) $( cat /sys/module/*fb*/parameters/fbheight )

  # Start the window manager
  matchbox-window-manager -use_titlebar no -use_cursor no &

  # Start the browser
  chromium --app=http://google.com
done;

FYI, you're missing some text from the end of line 12 of rc.local - @.+/_GROUP=\1;_MODE=\2;_XRES=\3;_YRES=\4;/p' );