Firefox (and other browsers) will only show the scrollbar when needed

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 5.1.2, 5.2.2
• Fix Version/s: 5.2.3
• Component/s: None
• Labels: None
• Branch Version/s:
  5.1.x
• Backported to Branch:
  Committed

Firefox (and also Opera and a few other browsers), only display the scrollbar when there is content that requires scrolling.
However, this means that the page will shift in it's width depending on if there is a scrollbar or not. We happen to believe Internet Explorer gets this one right in always displaying the scrollbar (though it could be handled by just not allowing the presence of a scrollbar to cause a shift in the design of the page).

This is easy to fix by adding overflow-y: scroll; to the html tag in the CSS. In our tests this has no other side effects and has been safe for use in every scenario we've tested.