I guess that you are using the default JS method window.open
. Since sencha mixes up things
in that case, I don't think you can add listeners or make changes if you are working on a mobile device.
So use this instead to make sure your call uses Cordova plugin:
var manual = null;
Cordova.exec(manual = window.open('resources/manual/manual.html', '_blank', 'location=no'));
The app crashes for me a few seconds after opening the page though.