I use Outlook Web Access to view my emails for work. When I click on an email to read, it doesn't fill up the pane that opens, and it's about 1/3 of the pane. It must be a Firefox issue, as I don't have this same problem when I open up an email using Google Chrome. How do I get my email to fill the entire pane and not be shrunk to 1/3 of the reading pane when I open the email?