Try installing the Midori browser, i've had very good luck with it.
To install Midori type the below command in a terminal window:
sudo apt-get install midori
or you can install Epiphany which is what rasbrain uses
sudo apt-get install epiphany-browser
Midori and Epiphany are very similiar
I didn't like that Midori didn't have the menu bar enabled by default, its easy to re-enable it though.