ua.sh

#!/bin/sh
# Script to change the B2G UA
# Based on Dave Hyland's script https://gist.github.com/2656232
# Options: default, fennec, android

LOCAL_PREFS_JS=C:\\prefs.js
PROFILE_DIR=$(adb shell echo -n "/data/b2g/mozilla/*.default")
REMOTE_PREFS_JS=${PROFILE_DIR}/prefs.js

rm -f ${LOCAL_PREFS_JS}
adb pull ${REMOTE_PREFS_JS} ${LOCAL_PREFS_JS}

ua=""
if [ "${1}" == "fennec" ]
then
    echo "Changing UA to Fennec UA"
    ua="Mozilla/5.0 (Android; Mobile; rv:20.0) Gecko/20.0 Firefox/20.0"
fi

if [ "${1}" == "android" ] 
then
    echo "Changing UA to Android Stock UA"
    ua="Mozilla/5.0 (Linux; Android 4.0.4; Galaxy Nexus Build/IMM76B) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.133 Mobile Safari/535.19"
fi

grep -v general.useragent.override ${LOCAL_PREFS_JS} > ${LOCAL_PREFS_JS}.tmp
if [ "${ua}" != "" ]
then
    echo 'user_pref("general.useragent.override", "'${ua}'");' >> ${LOCAL_PREFS_JS}.tmp
else
    echo "Reseting B2G to default UA"
fi

set -x
adb push ${LOCAL_PREFS_JS}.tmp ${REMOTE_PREFS_JS}
adb shell stop b2g && adb shell start b2g