23872, remove navigator cache - don't pull until performance test

Tests on desktop show about a 2% performance improvement (with a lot of variance in tests).  Needs to be tested in iPad as improvement could be better on a smaller device.    Used a script like this get timings:

#!/bin/bash
STARTTIME=$(date +%s)
npm run-script test
ENDTIME=$(date +%s)
echo "test takes " $(($ENDTIME - $STARTTIME)) " seconds"