Translation of Nachtschwärmer

Can you translate: Are you using the firefox browser? Install this tool in your browser window. The ones I suggested the other day are the most useful ones, because we would use it for generic terms which differ from Spanish.
In school, I had also learned Latin but it's been more than forty years ago. I grew up in Bern and I had lived there all my life, I had no opportunities to travel. It was not that easy during the war.
I hope this time you are in Germany and we can see each other more than last time at the airport terminal. I've got your current phone numbers and e-mail from George and I will contact you.