Have you tried the "To Google Translate" Firefox add-on? It's not as seamless as Chrome's built-in translation but it works for me.

https://addons.mozilla.org/firefox/addon/to-google-translate...

I lived in a country where I still spoke English and needed seamless translation for most websites (government, insurance, local news, etc.)

Chrome was just easier to deal with.

It's so sad they needed to disable the popup translation due to some changes by Google