(I would suggest asking an Admin to change your username, as it's your email address and now spammers can see it and spam your inbox. Go to [https://support.mozilla.org/en-US/forums/contributors https://support.mozilla.org/en-US/forums/contributors] and start a new Thread called "[ATTN Admin] Please change my Username" and tell them the new username you would like) For your issue, I would first update to Firefox 15.0.1. [[Update Firefox to the latest version]]. After doing that, see if Firefox is still slow. If it is, I'll ask you a few questions: 1. What anti-virus do you use? 2. Does a Firefox Reset Help? [[Reset Firefox – easily fix most problems]]