Wow... Dolphin 4.x? That is old. If I'm not mistake, the latest version of the Dolphin browser is over 7.x. Often you can't uninstall preloaded apps unless you root your device (rooting= gaining admin. rights and is a bit tricky as it's different on each device) That would be an option to consider but before you do that I'd check to see if there are any firmware updates. Often when a device is new, then it doesn't come preloaded with the latest software/firmware updates and this might be the source of your problem. Go to settings>about this device> software update and see if one is avilable for your aPad.
If that doesn't worrk there is a lot of information about rooting the aPad on the XDA forums.