To my knowledge i'm not behind any proxy and I have this problem too. Changing general.useragent.extra.firefoxComment to (Ubuntu) instead of (Ubuntu-feisty) in about:config fixes this problem. I found this solution on some other section of launchpad and someone there implied that using string "ist" in that the above mentioned key.
** Changed in: firefox (Ubuntu) Status: Rejected => Confirmed -- firefox - the connection was reset - Fiesty https://bugs.launchpad.net/bugs/95241 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs