Opening and closing Iceweasel for Kiosk

Question

I'm trying to set a kiosk up that turns the HDMI port off at night and on weekends. I set up a crontab to turn it off but when it turns on the screen is black until some movement makes it load back. Becuase of this I am trying to make Iceweasel close and reopen fullscreen to load the screen. So far Iceweasel closes and the HDMI port turns off and on but I can't get Iceweasel to reopon. How can I do it?

Terminal

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pi@raspberrypi:~$ crontab -e

#HDMI O/F
18 * * * tvservice -o > /dev/null && pkill iceweasel
8 * * 1-5 tvservice -p > /dev/null && fbset -depth 8 && fbset -depth 16 && $
2 8 * * 1-5 /home/pi/run_iceweasel.sh

run_iceweasel.sh

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#!/bin/sh
/usr/bin/iceweasel
end 0