script to download latest firefox nightly build

script to download latest firefox nightly build and extract to mydir

wget http://nightly.mozilla.org/ -q -O - |awk '/en-US.linux-i686/ {gsub(/href="/,"",$2)+gsub(/">/,"",$2);print $2}' | while read a 
do   
   wget -c "$a" -q -O /tmp/firefox-nightly-en-US.linux-i686.tar.bz2  && cd mydir && tar -xvjf /tmp/firefox-nightly-en-US.linux-i686.tar.bz2 
done