The best for Firefox......Bom bisurdo...

This is what I looking for. Pop-up translator. Thanks!!

la voy a ensayar gracias

Ich benutze ImTranslator schon viele Jahre. Er bietet mir wertvolle Unterstützung bei meinen Auslands-Korrespondenzen. Egal, ob ich ein einzelnes Wort übersetzen will oder ganze Sätze - es passt. Auch die Grammatik stimmt. Markiere ich Webseiten-Text, wird automatisch die Sprache erkannt und die Übersetzung angeboten. Sehr hilfreich!

Text to speech is limited by 200 characters. It is not really useful for reading full articles

10-20-23: only translator that works most of the time. Problem is they want to hijack your browser to force feed you their ads so they install code to do that-a form of hacking used by malware. Also you can't get rid of their traveling icon which appears even when this BS addon is not activated. Hackers.
11-3-2022: correction: doesn't "act" like malware. IS malware. Hijacks your browser to open with their crap adpage w/out your permission. Enuf said. Sometimes just doesn't load or work. cannot block this behavior via firewall, very intrusive and dishonest.
7-20-22: acts like malware. Every time you load your browser hijacks you to their webpage. Cannot get rid of this malware feature, neither by firewall or hosts. It works better than most of the other translators, but at what cost? Relies on google translate to get the job done so you sending your data to evil google.
Have tried about 6-7 translators and this is the ONLY one that works. Enuf said. And it's quick too.