Ouch!! What didn't you like about the new version? You can reply here or email support@printfriendly.com

You can install the previous version (3.2.0) from here - https://addons.mozilla.org/en-US/firefox/addon/print-friendly-pdf/versions/ and disable auto update

If you email support@printfriendly.com with your issues, we can let you know when the new version has fixed the issues you are facing.