Clear the cache and the cookies from sites that cause problems. * "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now" * "Remove the Cookies" from sites causing problems: Tools > Options > Privacy > Cookies: "Show Cookies"

Did not fix, I cleared the cache and cookies. The website is picasaweb.google.com A partial peice of the url looks like this: http://picasaweb.google.com/lh/login?continue=http%3A%2F%2Fpicasaweb.google.com%2Flh%2Flogin%3Fcontinue%3Dhttp%253A%252F%252Fpicasaweb.google.com%252Flh%252Flogin%253Fcontinue%253Dhttp%25253A%25252F%25252Fpicasaweb.google.com%25252Flh%25252Flogin%25253Fcontinue%25253Dhttp%2525253A%2525252F%2525252Fpicasaweb.google.com%2525252Flh%2525252Flogin%2525253Fcontinue%2525253Dhttp%252525253A%252525252F%252525252Fpicasaweb.google.com%252525252Fhome%25252526pli%2525253D1%25252526a

More data on behavior: The first screen opens with "Redirecting" then the second with URL too long. Anyone understand this? Is it a firefox issue, or Google? Thanks all.