There seems to be an issue with the DNS lookup whereby firefox won't use it to resolve IP addresses. For example. It won't open the website www.google.com.au but it will open the IP address for that site. Http://173.194.72.94. To temporarily fix this I need to switch the wi-fi off on the tablet and switch it back on. However it is only a short term solution as the problem reoccurs after a short time. I have chrome and the stock standard Internet browser installed on this Tablet and they don't have this problem. I have to use versions of firefox 28 or lower so the browsing will work properly. mozilla are continually bringing out newer versions of firefox but this problem still hasn't been fixed.