Hi folks, I am having trouble using google in firefox. I often get error messages and now I keep getting a (Error code: sec_error_reused_issuer_and_serial) message. I cleared all my recent history (cache and cookies included) but it didn't solve the problem. I went to preferences>settings>and selected "no proxy" but that didn't help either. I have a macbook pro and I am running version 10.7.5 Mac OS X. I don't have any anti-virus software installed. I'm not very good with computers and my knowledge is pretty close to nothing. Google works fine with safari. Someone please help. Edit: I just checked on flashback check.com and it says my computer is not infected.