Firefox https problem? : Error code: sec_error_bad_signature.
Was using Firefox Portable the other day and my sessions got screwed up so I decided to delete all the files and install the latest version fresh. Most of the https sites I went to gave me the error: sec_error_bad_signature, which I found out was something to do with certification validation. I read more on it and turns out that turning off https scanning in Avast solved my problem, but I'm not sure if this is a safe solution or something that is a bug by Firefox.