google translator at main google address (google.com) beige redirection at translate.google.pl?

Yes that would be correct if not in Poland. If in Poland maybe you would want to. If not in Poland whay would you have a redirect ? It maybe that you have some malware. https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware Keep a copy of your logs if anything is found as will need them at the malware forum you choose to help cleanup leftovers if any. Please let us know if this solved your issue or if need further assistance.