There are several ways to update programs on Windows without needing admin rights: - You could do it as Chrome does and have a per-user install. I don't think

There are several ways to update programs on Windows without needing admin rights: - You could do it as Chrome does and have a per-user install. I don't think Mozilla wants to do this. - You could install a service or a scheduled task to do the work for you. - MSI updates can be installed without admin rights if they're Authenticode signed, and Mozilla does have a valid Authenticode digital certificate.