Do you mean that it is opening links in a new window? If you would rather have a new tab instead, you can set that in Options > Tabs. Some links are set up so that they will open in a new tab or window. I know of no way to make those open in the same tab, short of changing the code on the page.

I'm not sure i could be any clearer, I said nothing about tabs? Go back and read it again. No use making it something it isn't