У вашего броузера проблема в совместимости с HTML5
Before you reset your DreamTab HD8 to factory default settings you may want to back up your media files and possibly your apps and app data. Here are some links that will provide some suggestions on how to go about doing so.
Connect your DreamTab to your computer using the charge cable to transfer media files from the internal storage to a folder on your computer.
http://www.nabitablet.com/support/article/how-do-i-transfer-music-pictures-movies-and-other-
Backing up media files and apps (not app data) to your cloud storage:
https://www.facebook.com/permalink.php?story_fbid=1442654125995192&id=1425893894337882
Backing up app data using Helium (steps courtesy of nabi Mom Jodie)
https://www.facebook.com/notes/jodie-nabi-mom/backing-up-app-data/868752749845907