User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1 Build ID: 20111220165912 Steps to reproduce: Clicked on several different messages to open them in individual tabs. Actual results: All opened fine. Scrolled down in 1st tab, then switched to 2nd tab and scrolled down in it also. Switched back to 1st tab and it was back at the 1st line. Expected results: All tabs should keep their scrolled positions so that you can switch back and forth between e-mails without having to scroll back down to the position you are interested in. Firefox keeps the position in the tabs when switching tabs and Thunderbird should also.