The Forward button normally appears dimmed until you click the Back button at least once. Then if you click the Forward button, you can move forward to the folder that you viewed before hitting the Back button. To see how the Back and Forward buttons work, follow these steps: 1.

Why is my back button grayed out?

Look for, and rename any Mozilla or Firefox program folders by adding . old to them. Do not rename the Mozilla Thunderbird folder if there is one.

What will the forward button enable a user to do?

Activating the back and forward buttons gives the user access to the previous page or the last page visited. They also provide a menu of the user's browsing history displaying the pages that have been visited.