Internet Tab Issues

Hi,

I have a problem opening internet sites. For example my home page is google. This works, I type in lets say Westpac banking, Westpac sites pop up and I select the one I want. When I get into the main site and need to click on a follow up link it will not open, I have to rick click and press open and then it will open in a new tab. I'm not sure which tab setting I should select in the settings section?
Hope you can help.
Thank you :)