Each window/tab is independent of the others. Open the first, go to the page you want. Open the second, go to the page you want.

Is there a problem?

Let's say you have a link in a page you're viewing, and you want to launch it in a second tab. Usually these methods work:

• right-click the link > Open Link in New Tab
• middle-click the link with the mouse scroll wheel
• Ctrl+click the link (scripts in pages can override this)

There may be sites that have a certain "flow" to them that do not let you load a page outside that flow for security or transaction integrity reasons. The site knows it's the same browser because Firefox sends the site its same set of cookies in both tabs. In that case, you might not be able to use these methods.