When I open a new browser window in Firefox 5.0 (i.e. I've already got Firefox open and hit <Ctrl> + N) the second browser window takes over a minute to load pages... and all instances of Firefox slow way down -- so there are major lags no matter what I'm doing in Firefox. For example, it takes 15 seconds or more for Firefox menus to appear after I scroll over them, and the same goes for bookmarks. Or when filling in a form, there are long delays after making keystrokes. If I close the second browser window, things return to normal. I'm on a Windows 7 64-bit computer if that helps in diagnosing the issue. Any ideas what's going on? I often need more than one browser window open, but can't do it with Firefox 5. Thanks